r/quantuminterpretation • • Dec 13 '20

Recommended reading order

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r/quantuminterpretation • • 9h ago

Jim Al-Khalili talking about Heisenbergs uncertainty principle makes me feel like we're pre-rendered. Like a computer game. Like we only see once it is seen. otherwise it does exist. or exists only when needed?

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r/quantuminterpretation • • 1d ago

Spooky Quantum Hallucinations

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r/quantuminterpretation • • 1d ago

Theory of existence

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r/quantuminterpretation • • 1d ago

Spooky Quantum Hallucinations

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r/quantuminterpretation • • 2d ago

Just addressing the comments to my recent post and explaining my thought process in depth with no AI,well I could have the spell check but decided not to even do that so you know this is me 🙂

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(the undetermined block universe)

Hi again I just got back from my two day hard work away from home so I thought I'd now sit down and reply to the comments about my imagined model of things and explain in depth and in my own words to address the negative and brushing off comments how my thought process came up with this possible design and why I still believe it to be a entirely reasonable possibility and a feasible theory which I have now named the “undetermined block universe” (and thank you for all your comments even the negative ones)

Anyway my theory came about from being fascinated by Quantum maniacs and reading the ongoing research and theories then after reading about (De Broglie–Bohm (Pilot Wave) mechanics and Edward Nelson's Stochastic Mechanics ) I imagined perhaps there is a possibility that particles do have a related guiding wave and it is the guiding wave which is observed going through both slits in the slit experiment and the particle may actually always be decided but it may be the guiding wave which has undecided and non local abilities(after all sometimes science obsevations are misinterpreted it was not so long ago that we all thought it was the bose higs that caused weight but then found it was responsible less than a few percent and it was actually kinetic energy of quarks ) ,so in this way of thinking my theory does not actually contradict bells theorem for it is giving up locality and saying there is indeed a non local connection but it is with the related particle wave (and not the particle itself)

and this led me to ask myself about the observation of the position of one entangled particle have a well established affect on the other whereas a lot of the scientific community look at this as it is a matter of when someone observes the state of one particle it instantly affects the state of the other,but then I thought there is possibly a realistic chance that it is not the observation of the viewer that affect both particles is could well be the measuring device itself interrupting with the

delicate and relatively mysterious pilot waves and so when this mechanical interruption happens both waves are affected .

And anyway I figure these pilot waves could have a undecided characteristic which gives us a possibility of undetermined block universe

anyway I thought I'd write this coming directly from myself without AI interface so excuse and of my spelling mistake ,and I'd also like to say to those (it's just all AI bull sort of comments) that I would think that anyone these days who was doing serious research of there own theory would want to check their facts with AI)

and I called my theory the undetermined block universe because I image a universe that started with the big bang and with the mysterious pilot wave keeping things undecided and undetermined

until the time and space fabric spreads out so much that time eventually stops moving.


r/quantuminterpretation • • 2d ago

Nonperturbative atoms like Bohr's - experimental disagreements and potential reparations

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In nonperturbative picture we work with Feynman ensembles of field configurations, e.g. for atom requiring hidden electron trajectories - with top LLMs tested properties vs experimental for Bohr's and many others, including hydrodynamical/dBB-like using electron coupled with quantum phase field, or "one field": with electron being topological soliton (quantized electric charge) of this field - https://doi.org/10.5281/zenodo.23470617


r/quantuminterpretation • • 2d ago

What if

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r/quantuminterpretation • • 2d ago

What if matter drops out of ftl cloud ?

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**The Dropout Theory — by David and Cleo**

How things become real: a thick cloud of particles moving faster than light, and the ones that slow down and fall out of it.

Everything you can touch - stars, planets, people - is the small part of the universe that slowed down. The rest is still moving too fast to be touched, seen, or held. It can only be felt, through gravity.

The whole idea in one paragraph. Before anything is a definite thing, it is part of a thick cloud of particles, all moving faster than light. Nothing up there is solid or settled. Every so often a particle slows down, crosses below the speed of light, and drops out of the cloud. That drop is the moment it becomes real: fixed, definite, and part of the world we live in. The crossing only goes one way - once a particle has dropped out, it cannot speed back up - and that one-way door is why the past stays past. Most of everything never crossed at all. It is still up there, or piled up just above the line. That is why most of the universe is invisible.

The picture in one image. Top: the fast cloud, with currents, fastest deep inside. Just above the line, the drag layer - dark matter piled at the door, never crossing. Below the one line, the world we live in. The arrow points down only: dropping out is permanent.

**No two people ever share exactly the same time**

Stand two people side by side, completely still, and ask whether they are in the same moment. This theory says no - never exactly. Being in two different places is enough to put a tiny gap between their times, and any movement at all makes the gap bigger. Sitting still, the gap is far too small for anyone to notice. It is invisible, not absent.

Press two heads together and the gap shrinks to about a hundred-billionth of a trillionth of a second - 0.00000000000000000000001 seconds. That is roughly the time light needs to cross a single proton, the smallest building block of ordinary matter. Below that, the words "at the same time" stop meaning anything at all.

**You can cut time forever, but nothing can happen below the floor**

On paper, time divides endlessly. You can always halve a second, then halve it again, and never run out. But a happening is different from a number. For anything to actually happen, something has to move or change, and nothing moves faster than light. Below that tiny floor of about 10-23 seconds, no event can start and finish. The time is there. Nothing can happen in it.

There is a smaller number often quoted, about 10-44 seconds, where today's theories of physics break down completely. That is a limit of our maths, not of the world. The floor in this theory is the higher, physical one: the point where things stop being things.

The lesson is simple: just because something can be calculated, it does not make it real.

**All of time is already laid out**

This theory treats time the way we already treat space. All of space exists at once; "here" just names where you are standing in it. In the same way, all of time exists at once - past, present, and future laid out together - and "now" just names where you are standing in it. Your now and someone else's now differ for the same reason your here and their here differ: you are standing in different places.

This matters later. The usual objection to anything moving faster than light is that it could send a message into the past and break it. But if the past is already laid out, like a place that exists, there is nothing there to break.

**The drop is the moment a thing becomes real**

Physicists have a long-standing puzzle: before a particle is measured, it seems to be in many possible states at once, and the act of measuring somehow settles it into one. Nobody has a settled explanation for how that settling happens.

This theory gives it a plain mechanism. There is no settling from inside the world, because the particle was never fully in the world. It was up in the cloud, moving faster than light, where nothing is definite. What looks like a mysterious settling is a speed change: the particle slowed down, crossed below the speed of light, and dropped out. We only ever see it after the drop.

And the drop cannot be undone. Crossing back would mean speeding up past light from below, which the speed limit forbids. That one-way rule is what gives time its direction.

**Most of everything is still up there**

Count up the universe and a strange fact appears: Everything we can see and touch - all the stars, gas, planets, and people - comes to only about 5 percent of what is there. The other roughly 95 percent has never been seen directly. It shows up only because its gravity bends the movement of the things we can see.

In this theory, that split is exactly what you would expect. The 5 percent is what dropped out. The rest never crossed the line at all: it is still up in the cloud, or slowed almost to the line and piled up just above it, close enough to pull with gravity, never in our space to be touched or seen. We are the thin residue. The cloud is nearly all there is.

**THE DRAG LAYER — DARK MATTER**

There is only one line in this theory: the speed of light, the one-way door. Cross it and a particle drops out - real, definite, part of our world. Dark matter never crossed it. That is the whole point of this section, and it is simpler than it first sounds.

The fast cloud is not uniform. It has currents, like a moving fluid, and there is drag at the boundary near the speed of light. Deep in the cloud, particles move way faster. As they near the drop point, the drag slows them down.

The speed of light is a wall from above, too. The closer a fast particle gets to it, the more it must shed to take the next step - and the last step costs everything. So particles creeping down through the cloud cannot quite finish the crossing. They stack up just above the line, like traffic at a gate. Dark matter is that pile-up: riding just above the speed of light, close enough to affect us, never crossing.

That is why no detector will ever catch it. It is never in our space at all. It sits behind the one-way door, on the far side. There is nothing here to detect - no particle passing through the laboratory, nothing to bump, nothing to leave a track. This is what the first bet below now rests on.

Its gravity still reaches us. The cloud was always felt only through gravity, and the drag layer is its closest part, so its pull is the part we feel most clearly. And the layer does not run even. It runs thickest where the door is busiest - around dropped matter, where the crossing traffic is heaviest. That is why dark matter hugs galaxies in halos: the pile-up gathers where the dropping happened.

Friction at the boundary does one more job. Drag sheds energy, and shed energy comes off as radiation - so the glow has an address now: it lives at the boundary. Most of the dropping happened very early, when the universe was hot and glowing, and the faint leftover glow that still covers the whole sky today fits the shape of that shed energy. That is a rhyme the model would expect, not a proof.

The currents matter too. A cloud with currents has grain - thicker here, thinner there - so the seeds from which structure grew were never uniform noise. They arrived already patterned. That is why galaxies could show up earlier than a smooth, even start would allow.

One thing dark matter is not: it is not a second kind of dropped matter, and dark energy is not another layer in this stack either. Dark energy is the cloud's push on the whole thing, as the next section says. Dark matter is simpler than either: cloud stuff, slowed by drag, queued at the door it never went through.

**Why the universe is speeding up - and why it started so fast**

The universe is expanding, and the expansion is speeding up. The usual story needs a mysterious push to explain it. This theory reads it differently. The cloud pushes outward. Dropped-out matter pulls back with its gravity. Early on, when dropping out was happening everywhere at a furious rate, the pull-back was strong. As the dropped matter spreads thinner and thinner, its pull weakens - so the push wins by default. The expansion speeds up not because the push grew, but because the opposition thinned out.

The same idea untangles the beginning. Distant parts of the early universe look oddly coordinated, as if they had somehow agreed on their conditions before any light could travel between them to arrange it. And telescopes now keep finding large, well-formed galaxies far earlier than light-speed construction should allow. If the cloud was never limited to light speed, there is no puzzle: the coordination happened up there, everywhere at once, before anything dropped out. "Too advanced, too early" is only too early if the builders were limited to light speed. These were not.

**This theory makes bets that can lose**

A theory that fits everything and risks nothing is worth little. This one sticks its neck out twice.

**Bet one - the detectors stay silent forever**

If dark matter is the pile-up in the drag layer just above the speed of light, then what the detectors are hunting never entered our space at all. It can pull with gravity across the boundary, but there is no particle down here to bump into a detector, however sensitive it is built. Huge underground detectors - XENONnT in Italy and LUX-ZEPLIN in South Dakota among them - have spent years listening for exactly such a bump and have heard nothing. This theory says they never will, because there is nothing here to hear. One confirmed catch, anywhere, and this part of the theory is wrong.

**Bet two - the push slowly weakens**

If the cloud itself slowly thins as particles drop out of it, then its outward push should slowly weaken over the life of the universe, instead of staying perfectly steady forever. Results from the DESI survey in 2025 hinted that the push might indeed be changing over time. That is a hint, not a proof, and it may not hold up. But it points the way this theory says things should point.

**What is honest to say about all this**

No particle moving faster than light has ever been observed. In standard physics, such particles are a speculation that most physicists set aside, partly because of the past-breaking problem described earlier - the problem this theory answers by treating all of time as already laid out.

So this is not established science, and it should not be read as a claim that the textbooks are wrong. It is a working idea. Its strength is that separate puzzles - why no two people share a moment, why becoming definite looks like a sudden settling, why most of the universe is invisible, why expansion speeds up, why the early universe was so organised so soon - all turn out to be one idea looked at from different sides: a thick, fast cloud, and the things that fall out of it.

Numbers used in plain form: the time gap at closest contact, about a hundred-billionth of a trillionth of a second, is the light-crossing time of a proton. The 5 percent / 95 percent split is the standard measured budget of the universe; reading most of the 95 percent as still above the line - cloud and drag-layer pile-up that never dropped out - is this theory's claim, not a measurement. The DESI 2025 result is described as a hint because that is how the survey's own scientists describe it.


r/quantuminterpretation • • 3d ago

what if time dilation can be explained through particle interactions

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r/quantuminterpretation • • 3d ago

what if time dilation can be explained through particle interactions

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r/quantuminterpretation • • 3d ago

What if. A Thought Experiment on Cosmological Inflation: Was the Big Bang a Cosmic Chain-Collapse of a 4D Block Universe?

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Hi everyone,
I’ve been thinking a lot about the conceptual tension between General Relativity's smooth spacetime fabric and Quantum Mechanics' probabilistic nature. I wanted to explore a philosophical thought experiment that bridges them by looking at John Wheeler’s Participatory Anthropic Principle ("It from Bit") through the lens of a static Einsteinian Block Universe.
Below is a conceptual essay exploring the idea that the Big Bang wasn't a physical explosion, but rather a catastrophic, instantaneous wave-function collapse—a "rendering" process that might offer an interesting philosophical solution to recent cosmological anomalies like JWST's early mature galaxies.
I'd love to hear this community's critique on the epistemological and metaphysical implications of an informational/observer-dependent model of cosmic origin.

What if the Big Bang wasn’t an explosion of matter out of nothing, but rather the moment our universe was first "noticed"?
When we try to understand reality, we are forced to grapple with a massive contradiction at the heart of modern physics:

**The Large Scale:**
Einstein’s General Relativity tells us spacetime is a smooth, continuous, and predictable fabric.

**The Subatomic Scale:**
Quantum Mechanics tells us reality is a choppy, pixelated, and fundamentally chaotic smear of probabilities.

Because these two rulebooks spit out mathematical nonsense when forced together, physicists have spent a century searching for a bridge. To find it, maybe we have to look past what is happening *inside* our universe and ask a deeper question: What if the ultimate "resting state" of reality is entirely timeless, and our universe is merely its byproduct?

**The Block Universe and the Outside Observer**
Einstein himself championed the concept of the **"Block Universe"**—the idea that the past, present, and future all exist simultaneously as a static, four-dimensional geometric sculpture.
If a hypothetical observer were to look at our universe from the "outside"—completely external to spacetime—they would not experience time linearly. To them, your birth, your reading of these words, and the eventual death of the universe would all coexist in a single, eternal "now."
But this raises a profound question: If the universe already exists in a complete, timeless resting state, why do we experience it frame-by-frame as a violent, expanding timeline?

**The Big Bang as an Act of Observation**
The answer might lie in a quantum chain reaction.
In quantum mechanics, a particle doesn't exist in a definite place until it interacts with an environment or an observer—a process that "collapses" its fuzzy wave function of probabilities into a crisp, physical reality.

**What if the Big Bang was the exact moment an outside observer "looked/interacted" at a single quantum state within the timeless block?**
Before that moment, everything coexisted as an unmanifested soup of infinite data. But the instant that first foundational particle was observed, it snapped into a definite physical reality. Because quantum mechanics proves that particles can be deeply entangled across space and time, collapsing that one particle would inevitably force every other particle connected to it to collapse into a definite state as well.
This would trigger a cosmic domino effect—an **information wildfire** ripping through the pre-existing block. To us, trapped inside the timeline, this hyper-fast cascade of reality snapping into focus would look like a massive, instantaneous explosion. We would perceive this rendering process as **Cosmic Inflation**—the theoretical split-second where the universe expanded faster than light. Space didn't physically stretch out of nothing; the cosmic blueprint was simply being instantly rendered by a chain reaction of observation.

**Solving the "Impossible Galaxy" Mystery**
While this sounds like pure metaphysics, it offers an elegant solution to one of the most baffling anomalies in modern astronomy.
Recently, the James Webb Space Telescope (JWST) looked deep into the early universe and discovered something that shouldn't exist: massive, highly mature, and chemically evolved galaxies existing just 300 to 500 million years after the Big Bang. According to the standard, "bottom-up" model, it should have taken billions of years of slow, gravity-driven collisions for pristine hydrogen gas to build structures that complex.
But if the universe is a pre-existing 4D Block unspooling via a quantum chain reaction, the grand architecture of the cosmos was already there. When the observer’s observation rippled through the system, it didn't ignite a messy explosion that had to wait for gravity to slowly do its job over eons. Instead, it materialized complex cosmic structures exactly where and how they already existed in the timeless state. The galaxies appear fully formed because they *were* rendered fully formed.

**Why the Illusion Matters**
It is easy to hear a theory like this and feel discouraged. If the movie is already filmed and we are just watching it play out, it can feel deeply deterministic and disempowering.
But true predictability requires infinite information, which a human brain can never hold. Because our perspective is beautifully localized, the future remains entirely open and unwritten to us.
More importantly, it repositions humanity's role in the cosmos. If reality requires observation to snap from a hazy "maybe" into a solid "is," then we are not just helpless byproducts of a mechanical universe. Every time we build a telescope, ask a fundamental question, or look out at the stars, we are the universe looking back at itself—actively participating in rendering the grand story of reality, one frame at a time.

**TL;DR:** The Big Bang wasn't a physical explosion. It was the initial quantum wave-function collapse of a pre-existing, timeless 4D "Block Universe." This triggered an instantaneous information chain reaction (which we perceive as Cosmic Inflation) that rendered the universe into reality—explaining why JWST is finding fully formed, "impossible" galaxies in the early universe.
What are your thoughts? Does an informational/participatory universe make more sense than a physical singularity?


r/quantuminterpretation • • 3d ago

Two Arrows of Time and Quantum Retrocausality

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A 2025 paper shows how certain equations for open quantum systems can retain two opposing time directions. Retrocausal models ask a different question: could later measurement settings help determine an earlier underlying physical state? The delayed-choice quantum eraser is often presented as experimental proof that the future changes the past, but its interference patterns appear in correlations obtained by sorting paired records. These are serious questions about time, causation, and quantum theory. They do not establish that we can rewrite recorded events or that consciousness controls the past.

The earlier post asked whether physics points beyond fundamental spacetime. This follow-up examines something more specific: whether the direction of time, and our usual account of causes preceding effects, belong to the deepest description of nature.

The difficulty begins with the phrase “time running backward.” It can refer to several different things, and the evidence for one does not automatically establish the others.

1. WHAT DOES REVERSING TIME MEAN?

Idea What it means
Time-reversal symmetry The relevant laws admit an appropriately reversed physical history, with quantities such as momenta reversed too.
A thermodynamic arrow A direction associated with macroscopic relaxation and entropy increase under particular physical conditions.
Retrodiction Using information acquired later to infer an earlier event or state.
Retrocausality In the models discussed here, later experimental settings enter the description of earlier underlying physical states.

Retrodiction is familiar. Reading a fossil today changes what we know about an animal that lived long ago. It does not imply that examining the fossil caused the animal to exist. The harder question is whether a theory needs later settings to help specify what physically happened earlier, rather than simply to update our knowledge of it. Wharton and Argaman distinguish such dependence on future inputs from ordinary predictions and from sending messages into the past in their review of quantum reformulations (https://arxiv.org/abs/1906.04313).

Time-reversal symmetry is also distinct from the everyday arrow. A reversible microscopic law can coexist with overwhelmingly one-sided macroscopic behavior. There are vastly more microscopic arrangements corresponding to dispersed gas than to the same gas confined to a small corner. Starting from a suitable low-entropy condition, typical evolution leads toward the larger macrostate. Lebowitz explains how microscopic dynamics, typicality, and boundary conditions work together in the statistical account of irreversibility (https://arxiv.org/abs/2105.03470), including in his classic article “Boltzmann’s entropy and time’s arrow” (https://physicstoday.aip.org/features/boltzmanns-entropy-and-times-arrow).

That account does not remove the question of why the relevant earlier conditions were special. The universe’s special low-entropy starting condition is usually called the Past Hypothesis, and some philosophers, including Eddy Keming Chen, argue that it should count as a fundamental law in its own right (https://arxiv.org/abs/2008.00611). A dynamical law tells us how a state evolves; it does not, by itself, explain why that state was the one supplied. The boundary conditions carry part of the explanatory burden.

One qualification matters: exact time-reversal symmetry is not universal in nature. The BABAR collaboration directly observed time-reversal violation in neutral B-meson transitions (https://arxiv.org/abs/1207.5832). The discussion below concerns models with time-symmetric microscopic dynamics; it should not be inflated into the claim that every physical interaction is exactly time symmetric.

2. WHAT THE OPPOSING ARROWS PAPER FINDS

Thomas Guff, Chintalpati Umashankar Shastry, and Andrea Rocco published “Emergence of opposing arrows of time in open quantum systems” in Scientific Reports in 2025 (https://arxiv.org/abs/2311.08486; https://doi.org/10.1038/s41598-025-87323-x).

An open quantum system exchanges energy or correlations with an environment. Its effective evolution can sometimes be approximated as memoryless: the current state suffices to predict subsequent evolution without retaining the detailed history. This is the Markovian description, whose usefulness and limits are reviewed by Breuer and colleagues (https://arxiv.org/abs/1505.01385).

Guff and colleagues argue that a carefully applied Markov approximation preserves time-reversal symmetry in their equations for a system interacting with a heat bath, including Brownian, Lindblad, and Pauli dynamics. Relaxation can occur in opposing directions away from a special time origin at which system and environment are assumed uncorrelated; this does not make every irreversible process physically invertible.

The University of Surrey’s February 2025 press release presented the finding in its headline as “evidence” of two arrows of time. Its body describes opposing directions theoretically emerging from the equations and reports no observation of time running backward (https://www.surrey.ac.uk/news/physicists-uncover-evidence-two-arrows-time-emerging-quantum-realm).

This is a theoretical result about effective equations, rather than an observation of clocks or detector records reversing. The authors’ proposed cosmological extension remains speculative.

My takeaway is that dissipation alone may not select a fundamental direction. That remains separate from later measurements influencing earlier states.

3. OTHER "BACKWARD TIME" HEADLINES

In 2022, teams in Austria and China reported photonic circuits implementing a “quantum time flip,” with an operation acting in a quantum superposition of forward and time-reversed input-output directions (https://arxiv.org/abs/2211.01283; https://arxiv.org/abs/2210.17046). These experiments built on Chiribella and Liu’s theoretical scheme for quantum operations with indefinite time direction (https://arxiv.org/abs/2012.03859). Laboratory clocks ran forward throughout, and nothing travelled back into the past. Researchers nevertheless disagree about whether the photons underwent a genuine reversal or a simulation of one, as their differing assessments in Quanta’s coverage make clear (https://www.quantamagazine.org/how-quantum-physicists-flipped-time-and-how-they-didnt-20230127/).

In a different experiment, Angulo and colleagues in Steinberg’s Toronto group measured the average time transmitted photons spent as atomic excitations in a cloud of atoms (https://arxiv.org/abs/2409.03680). For some pulses this average was negative, matching the light’s negative group delay; the quantity is a weak value conditioned on later detecting a transmitted photon, rather than an ordinary elapsed time read from a clock (https://journals.aps.org/prl/abstract/10.1103/gjfq-k9dv). The result supplies no channel for information to travel backward in time or faster than light, a distinction also emphasized in Scientific American’s reporting (https://www.scientificamerican.com/article/evidence-of-negative-time-found-in-quantum-physics-experiment). These headlines concern superpositions of process directions and unusual measured averages, not a recorded past being rewritten.

4. WHAT RETROCAUSAL MODELS PROPOSE

A familiar way to explain an experiment is to specify an initial state and evolve it forward until a measurement produces a result. A retrocausal account can instead allow the underlying state between preparation and measurement to depend on the later measurement setting.

The proposal concerns the relationship among physical variables across the experiment. It need not describe a past that first happened one way and was subsequently overwritten. A complete history can be constrained by conditions at more than one temporal boundary. Huw Price develops the motivation for allowing this possibility in quantum theory, while making clear that the argument depends on additional assumptions about the underlying description (https://arxiv.org/abs/1002.0906).

A well-known time-symmetric reformulation, the two-state vector formalism, describes a system between preparation and later measurement with one state evolving forward from the preparation and another evolving backward from the post-selection. Aharonov and Vaidman present it as a time-symmetrized approach to standard quantum theory, especially useful for pre- and post-selected experiments and weak measurements (https://arxiv.org/abs/quant-ph/0105101). Using a backward-evolving state in a formalism does not, by itself, commit us to a backward physical influence; that further claim depends on how we interpret the formalism.

Why consider it? Bell experiments put pressure on a familiar package of assumptions, including local causality and statistical independence between measurement settings and relevant hidden variables. A retrocausal model can relax that independence through dependence on later settings, while trying to keep influences locally mediated through spacetime. “Locally mediated” here is not the full Bell-locality condition that the observed correlations violate. Wharton and Argaman review concrete models and explain why dependence on future inputs can open this route (https://arxiv.org/abs/1906.04313). Their locally mediated toy models address specific entanglement scenarios, and they identify extending such models to all quantum phenomena as a major open challenge (https://arxiv.org/abs/1906.04313).

The attraction is understandable: if the underlying description treats temporal directions more symmetrically, perhaps some apparent action across distance can be represented through a different causal structure. The task is to turn that possibility into a coherent account of the actual correlations.

Superdeterminism offers another route to statistical dependence between settings and hidden variables. Hossenfelder and Palmer defend it as a research program (https://doi.org/10.3389/fphy.2020.00139). The shared statistical dependence does not make every such theory retrocausal: a model still has to specify whether the connection comes from earlier conditions, later boundary inputs, or some other structure.

5. DOES TIME SYMMETRY FORCE RETROCAUSALITY?

Leifer and Pusey sharpened this question in their 2017 Proceedings of the Royal Society A paper “Is a time symmetric interpretation of quantum theory possible without retrocausality?” They show that quantum predictions conflict with a package including no retrocausality, a particular symmetry of the underlying physical description, and other assumptions about physical states and their role in mediating correlations (https://arxiv.org/abs/1607.07871).

The symmetry premise is stronger than observing that a familiar evolution equation can be reversed. It asks for a relationship between symmetry in experimental probabilities and symmetry in the underlying account of reality. Their result requires at least one assumption in the package to be relinquished; it does not identify retrocausality as an experimentally established mechanism.

The distinction generated a substantive exchange. Tim Maudlin argued that the proof contained an error and proposed a model he considered a counterexample (https://arxiv.org/abs/1707.08641). Leifer replied on both points: Maudlin’s model does not satisfy the particular time-symmetry premise used in the theorem, and the alleged error in the proof rests on a mistaken objection (https://arxiv.org/abs/1708.04364).

That is why the slogan “quantum mechanics is time symmetric, therefore the future causes the past” goes too far. The interesting argument concerns which additional principles we should require of an underlying theory.

6. WHAT DELAYED CHOICE CHANGES

Wheeler’s delayed-choice idea concerns when an experimental arrangement is selected. In an interferometer, recombining two paths can reveal interference, while a different arrangement can distinguish them. Delaying the selection challenges a simple picture in which the photon arrives with an advance commitment to behave as either a classical wave or a classical particle. Ma, Kofler, and Zeilinger review the proposals and their experimental realizations (https://arxiv.org/abs/1407.2930).

In this setting, the late choice changes which measurement is performed. It does not require an already recorded detector result to be rewritten. The quantum eraser adds entanglement and correlations between two measurement records, making the interpretation more tempting—and the distinction between a complete dataset and a selected subset more important.

In Kim and colleagues’ experiment, reported in a 1999 preprint and published in 2000, photon pairs were generated in two possible source regions. One member, the signal photon, was detected at a position labeled D0; its partner, the idler, followed optical paths leading to other detectors. The signal was detected about eight nanoseconds before the idler. The paper specifies what appeared in the coincidence records (https://arxiv.org/abs/quant-ph/9903047).

Partner detector used to select matching D0 records Pattern in that selected set
D1 Interference fringes
D2 A complementary fringe pattern with a shifted phase
D3 or D4 No interference fringes

The original apparatus used beam splitters to route idlers among these outcomes. Calling it “delayed choice” should not imply that a person could freely select the individual detector click after seeing D0.

7. WHY THE FRINGES APPEAR AFTER SORTING

Qureshi’s analysis of a closely related Mach–Zehnder interferometer version of the eraser shows why the two erasing outcomes reveal complementary patterns: bright regions in one align with dark regions in the other. Combining the appropriately weighted subsets removes the interference structure (https://arxiv.org/abs/1908.03920).

The probability bookkeeping can be written simply:

P(x) = ÎŁâ±Œ P(j) · P(x | j)

Here x is the signal position, and j labels the partner outcome. The complete distribution includes every outcome with its actual frequency; a selected fringe pattern describes a joint correlation.

Imagine retaining the original list of D0 positions and timestamps. Later, the partner results let you label entries and plot subsets. The positions in the original list remain the same. What changes is which question you ask of the paired data.

This does not reduce entanglement to ordinary classical ignorance. It identifies how the experiment displays its quantum correlations. The distinction matters because a striking conditional pattern need not be a controllable change in the earlier local statistics.

A later laboratory implementation by Ashby, Schwarz, and Schlosshauer compared delayed erasure with an arrangement without the delay and found agreement, as quantum theory predicts. Their experiment used physical optical delays and photon detections; the timing of erasure did not supply a new effect beyond the predicted correlations (https://arxiv.org/abs/1601.06089).

8. WHY THIS DOES NOT SEND A MESSAGE INTO THE PAST

Suppose the idler operator wants to transmit a bit to someone who already holds the signal records. For a usable message, the earlier signal data alone would have to distinguish the later choice. Standard quantum theory supplies no such channel. Changing the partner’s measurement basis does not change the signal’s unconditioned local distribution when all partner outcomes are included. This is the no-signaling distinction discussed in the Bell-nonlocality review by Brunner and colleagues (https://arxiv.org/abs/1303.2849).

The operator also cannot choose the particular random partner outcome needed to select one fringe pattern rather than its complement. To identify the subsets, the two sides must compare their records through an ordinary communication channel. By that stage, the receiver has acquired additional information; the earlier standalone dataset never contained a readable message selected from the future.

There is an even stronger reason to avoid a literal story in which a later event reaches backward and changes an earlier image. Ma and colleagues implemented quantum erasure with actively selected settings that were spacelike separated from the relevant interference events, using both a 55-metre fibre arrangement and a 144-kilometre free-space link between islands. A light-speed signal could not connect them within the experiment, and different reference frames need not agree on their temporal ordering (https://arxiv.org/abs/1206.6578).

These arrangements preserve the correlations while undermining an intuitive account that depends on one detector universally happening first. They do not supply an operational channel across that separation.

9. CAN A RETROCAUSAL INTERPRETATION STILL EXPLAIN THE ERASER?

Yes. The absence of a backward message does not, by itself, eliminate retrocausal accounts of hidden physical variables. An interpretation can describe the entire experiment using a different underlying temporal structure while preserving the same observed probabilities.

For example, Fearn analyzes Kim’s experiment through Cramer’s transactional interpretation, using retarded and advanced waves to describe the process. That account reproduces the experimental predictions while explicitly denying backward communication (https://arxiv.org/abs/1501.00970).

The distinction is between accommodating a result and being uniquely supported by it. Standard quantum mechanics predicts the eraser correlations without requiring a retrocausal ontology, while a transactional interpretation can describe them in its own terms. The experiment alone does not choose between those accounts.

Kastner likewise argues that delayed-choice eraser experiments do not demonstrate retrocausation beyond the entangled correlations already involved (https://arxiv.org/abs/1905.03137). We can take the experimental result seriously while leaving the underlying interpretation open.

The same discipline applies to the opposing-arrows paper. Its time-symmetric dissipative equations and a retrocausal interpretation of measurement answer different questions. Neither result can serve as a substitute for the other’s argument.

10. WHAT WOULD STRENGTHEN THE CASE?

A serious retrocausal model has to reproduce the quantum probabilities and explain why its underlying dependencies never become a usable signaling channel. This is a substantive constraint, not something resolved merely by drawing an influence backward along a timeline.

Wood and Spekkens show that, within the causal-modeling framework they analyze, explanations of Bell correlations face a fine-tuning problem: underlying causal connections have to coexist with the absence of observable signaling, including in explanations using superluminal influences, superdeterminism, or retrocausal influences without causal loops (https://arxiv.org/abs/1208.4119). A model needs an account of that coexistence, whether through its symmetries, dynamics, or other structural principles.

My standard would be to ask what the proposed account explains more clearly, which assumptions it replaces, and whether it yields a distinctive test. A confirmed prediction separating it from competing accounts would be especially informative. Where two accounts give exactly the same observable predictions, the experiments they share cannot by themselves establish which underlying picture is correct.

Consciousness introduces a further question. In the experiments discussed here, the relevant operations involve sources, beam splitters, measurement settings, detectors, and the comparison of records. My inference is that calling those operations “observation” supplies no additional evidence that awareness selects the temporal direction or changes an earlier event.

Claims that minds can sense future events can also be tested: in 2011, Daryl Bem reported experiments suggesting that later events influenced earlier responses. Three independent, pre-registered replications of one key experiment, concerning whether later practice improved earlier recall, found no significant effect (https://pmc.ncbi.nlm.nih.gov/articles/PMC3303812/). My takeaway is that awareness reaching backward in time is a testable claim, and this prominent result did not hold up in those replications.

Someone could propose a theory assigning consciousness that role. The proposal would then need to show what awareness contributes to the physical model and how that contribution could be distinguished from the apparatus and dynamics already described.

The possibilities remain interesting without collapsing them into a single claim. An emergent arrow of time concerns how temporal asymmetry arises. Retrocausality concerns the dependence of underlying states on later inputs. The quantum eraser concerns which interference correlations appear when measurement records are compared.

My conclusion is that quantum physics gives us good reasons to examine our assumptions about time and causation. It has not established that the future rewrites recorded history, and the results discussed here do not select consciousness as the explanation. The deeper question is how a physical description of the whole experiment produces the relationships we observe.


r/quantuminterpretation • • 4d ago

John Wheeler, one Electron theory

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Did anything ever come of this? Was there any math that Wheeler stood on?

Also, Wouldn't it make more sense that, it's the quantum field, where the unity comes from. Perhaps Its not correct to say independent individual electrons, since all seemingly individual electrons are excitations of the same field?


r/quantuminterpretation • • 4d ago

Hi everyone "I'm looking at quantum mechanics from a perspective of Structured Local Realism, heavily inspired by De Broglie–Bohm (Pilot Wave) mechanics and Einstein's realism, but rejecting the infinite multiverse. I'd love to hear your thoughts on this logic."

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The "Structured Local Realism" Model: An Elegant Alternative to the Multiverse

I’ve been thinking deeply about quantum mechanics, cosmic fine-tuning, and the multiverse. I find the mainstream "Many-Worlds" view (infinite splitting universes) to be ultimately and infinitely messy. As Occam’s Razor states, "the option with the fewest assumptions should be preferred," so I’ve formulated an alternative model of a singular, advanced-design universe that accounts for quantum behavior without the mystical or chaotic baggage.

Here are the core tenets of my theory:

1. Definite States over "Limbo Land" (Objective Realism)

Mainstream Copenhagen physics says particles exist in a ghostly, undecided "superposition" until observed. I believe particles are never truly undecided. Entangled particles always have a definite, set physical state (like spin direction) from the moment they are created. They do not float around in a limbo of infinite probabilities waiting for a human mind to look at them. Reality is locally real and objective.

2. A Defined, Non-Local Guiding Grid (The "Pilot Wave" Mechanism)

If particles have definite positions, how do we explain the wave-like interference pattern in the Double-Slit Experiment?

  • The particle is a solid entity that only goes through one slit.
  • However, it possesses an undetected, built-in wave-like ability (similar to De Broglie-Bohm Pilot Wave Theory). This underlying mathematical wave travels ahead of the particle, passes through both slits, and physically guides the particle along a specific track.
  • This grid operates via non-locality (which mainstream science has already proven to be real). Because the entire universe sits on this single, interconnected architectural web, an update to the wave at one slit—or on one side of an entangled pair at a great distance—is felt instantaneously by the particle.

3. The Experimental Setup is the Decider

We don't need human consciousness to explain why a quantum wave "collapses" when a detector is turned on. It is a purely mechanical process. The physical geometry, sensors, and cables of the experimental apparatus rewrite the local circuit. When we force a particle to interact with a sensor, that physical interaction violently scrambles the delicate guiding wave, forcing the particle to behave like a standard macro-object. The hardware setup itself dictates the timeline.

4. Advanced Design, Bounded Options

Ultimately, the universe behaves exactly like a highly advanced, structured setting or database. The laws of physics—including the String Theory Landscape of \(10^{500}\) possible configurations—are not an invitation for infinite messy universes to form by accident. They represent a finite master blueprint. The architecture provides a massive menu of structured options, but the universe is engineered so that only the single path chosen by physical interactions actually materializes and carries on.

Summary: Reality is a singular, beautifully engineered mega-structure. It uses a non-local wireless network to keep things synchronized, but it stays highly efficient by rendering only one real timeline in our one true universe.


r/quantuminterpretation • • 6d ago

2022 Nobel Prize

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r/quantuminterpretation • • 7d ago

This is out of curiosity but what is the difference between the theory of a cyclic universe theory and the big bounce theory?

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r/quantuminterpretation • • 7d ago

Here is a hypothesis about Double slit experiment

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I am open to criticism


r/quantuminterpretation • • 8d ago

If The Universe Was Infinitely Expanding, would it be a Parodox

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r/quantuminterpretation • • 9d ago

If light is both a particle and a wave

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r/quantuminterpretation • • 10d ago

What If Spacetime and the Laws of Physics Are Emergent?

0 Upvotes

What If Spacetime and the Laws of Physics Are Emergent?

I've been developing a speculative theoretical framework called RUFT (Relational Universe Framework Theory), investigating whether physical reality can emerge from a more fundamental structure of distinguishable relationships.

The central hypothesis is that space, time, matter, and physical laws may not be fundamental, but instead arise from stable patterns of information-preserving interactions.

  1. Distinguishability as a Foundation

Two physical states are operationally distinct only if some possible interaction can distinguish them.

This suggests that physical identity may be fundamentally relational rather than spatial.

  1. Emergence of Spacetime

RUFT proposes that stable information transfer and persistent relational records could generate effective causal ordering and locality without assuming an underlying spacetime geometry.

Under this hypothesis, space and time emerge from the organization of relationships rather than existing as fundamental backgrounds.

  1. Physical Laws as Stable Structures

The deeper hypothesis is that physical laws may correspond to robust mathematical structures that remain stable under relational dynamics and coarse-graining.

Rather than assuming geometry and causality, RUFT attempts to investigate their emergence from more primitive constraints.

  1. The Fundamental Question

If physical reality emerges from distinguishable relationships, what determines which relationships are physically realizable?

Could consistency, composability, and information preservation constrain the possible laws of nature?

The ultimate question is whether the structure of physical reality can be derived rather than assumed.

RUFT remains speculative. The next step is computationally testing whether locality, causal structure, and effective dimensionality emerge from initially non-spatial relational networks.

I'm interested in criticism from researchers familiar with quantum foundations, causal sets, information theory, and emergent spacetime.


r/quantuminterpretation • • 12d ago

how a local interaction coordinate response of spatically separated parts of atom ?

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r/quantuminterpretation • • 12d ago

Is probability the 4th dimention?

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r/quantuminterpretation • • 13d ago

Quantum Mechanics carries an assumption: the observer is a point. Einstein knew it was important. He recorded the debt twice: borrowed rods and clocks, to be eliminated "at a later stage of the theory." And the founders of Quantum Mechanics did the same.

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Special Relativity carries an assumption: the observer is a point. Einstein knew it was important. He recorded the debt twice: borrowed rods and clocks, to be eliminated "at a later stage of the theory." And the founders of Quantum Mechanics did the same.

This record documents the century of that debt. The theorems that barred the finite body and were read as final. The axiomatic tradition that pared those theories' assumptions to almost nothing and never put this one on the list. The paradoxes that returned every decade, each filed as a puzzle.

This record then documents the mathematics. Folds, caustics, catastrophes that arrived from another direction, carrying every tool the payment needed. This became the later stage.

The claim is narrow: the assumption was identified but ultimately undeclared, the replacement became available decades ago, at which time no new mathematics was required. This is a historical record of those works. Comments appear in the margins relating the same questions and works to The Observer Lemma. The consequences are derived there. https://vms-institute.org/theory/related-works/


r/quantuminterpretation • • 13d ago

Help me understand more about an electron

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