Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [quantum-interpretations]

This tag is for questions relating to what, if anything, the quantum mechanical formalism and experimental results say about the way the world works.

2
votes
1answer
44 views

Particles trajectories in Stern-Gerlach experiment

I red this sentence on "D.J. Griffiths, Introduction to Quantum Mechanics" talking about the using of heavy particles for the experiment. "...heavy so we can construct localized wave packets and ...
3
votes
2answers
111 views

How to deduce quantum non-locality from indeterminism?

In the paper ''Quantum non-locality as an axiom'' (Popescu, S. & Rohrlich, D. Found Phys (1994) 24: 379. https://doi.org/10.1007/BF02058098), it is stated that the conventional formalism of ...
-4
votes
1answer
130 views

Which experiment clearly shows us that Heisenberg Uncertainty Principle is ontological and not epistemological?

I have heard that the Heisenberg Uncertainty Principle(HUP) is not because of our limitations in measuring and the apparatus used but instead because of the very way things are I searched online in ...
3
votes
1answer
96 views

Are properties such as locality and realism properties of all theories, some theories, or interpretations of theories?

I have a strong intuitive feeling, based for example on the Bothe-Geiger experiment, that quantum mechanics is nonlocal. But intelligent people who have thought about these things make claims such as ...
1
vote
0answers
134 views

Does the quantum eraser double slit experiment disprove many worlds interpretation?

The quantum eraser double slit experiment shows that interference pattern is destroyed not by interacting with the quantum particle, but rather by getting which path information. In this experiment ...
0
votes
1answer
48 views

What determines the determinism of observables?

It is well known that there exists certain class of physical observables like momentum and position which are common to both classical and quantum mechanics, and has different 'kinds of predictability'...
2
votes
1answer
76 views

Are the different quantum interpretations mere differences in Semantics?

Are the different interpretations of quantum mechanics mere semantic differences?(since almost all the interpretations share the same mathematical formalism , except for the collapse models). Does the ...
-1
votes
2answers
235 views

Single slit experiment and the uncertainty principle - contradiction?

I have read for example here that the single slit experiment can be seen as a visualisation(?) of Heisenberg's Uncertainty principle. Basically, the photons passing through the slit are given a fixed ...
2
votes
1answer
131 views

From locality to deterministic hidden variables

According to this link here Bell said: "My own first paper on this subject ... starts with a summary of the EPR argument from locality to deterministic hidden variables. But the commentators have ...
6
votes
4answers
220 views

How are probabilities “physically real”?

I see several related questions, mostly taking the standard position/interpretation that complex-valued amplitudes aren't "physically real" (though their imaginary components do participate in ...
-1
votes
1answer
78 views

The wave function of the photon and electron are probability waves, does this mean the Maxwell are some time correct some time wrong? [closed]

The wave is probability wave, it is seams that the wave function some time is correct, the energy is sent out. Some time it is wrong the energy is not sent out. Hence we can obtained the conclusion ...
9
votes
7answers
766 views

Is the Copenhagen interpretation falsifiable?

According to the Copenhagen interpretation, physical systems generally do not have definite properties prior to being measured. The Schrödinger's cat is both dead and alive, until an observation is ...
0
votes
0answers
119 views

Does the many worlds interpretation still require retro-causality?

The delayed choice quantum eraser experiment seems to require retro-causality: the which-path information is deleted after the particles arrive at the detection screen. But does the many worlds ...
0
votes
0answers
24 views

Are quantum mechanics non-deterministic? [duplicate]

I am often being told that quantum mechanics are deterministic, but according to the Copenhagen interpretation, when the wave function collapses, the particle randomly chooses its state and I can't ...
1
vote
0answers
49 views

In the “many worlds” interpretation does every possible past which leads to the present exist

Does the many worlds interpretation of quantum physics apply only to the future, or does it apply equally to the past? Rather than a cat in a box, imagine a dinosaur in a box 65 million years ago. In ...
0
votes
0answers
85 views

Has quantum “solipsism” been addressed in the MWI literature?

There are similar-sounding questions in philosophy SE (see here and here), but they are rightly ignored for being too vague. I will try to be more precise. There is a particle in state $|\psi_0\...
-2
votes
1answer
93 views

Proving which Quantum Mechanics interpretation is correct [duplicate]

Let's assume that the existence of gravitons is theoretically proven or they are detected by LHC could one interpretaion be proven correct?
0
votes
2answers
151 views

Quantum mechanics interpretations [closed]

Let's assume that the existance of the graviton is proved theoretically or it is detected by the LHC and there is found a way for Pilot Wave Theory for it to account to special relativity via the ...
2
votes
1answer
535 views

Couder's walking droplets - what are issues of using its intuitions to interpret quantum analogoues? [duplicate]

There are these popular experiments with droplets having wave-particle duality, e.g. here is Veritasium video with 2.3M views, great webpage with materials and videos, a lecture by Couder. Among ...
1
vote
2answers
255 views

Quantum foundations and QM interpretation - reading material

I recently wrote an answer on a question and I would infer from the responses that there is not widespread awareness of the context of the development of QM and its various interpretations. Instead, ...
0
votes
1answer
97 views

Understanding Bell's Inequality in Sakurai's text

In Sakurai's book Modern Quantum Mechanics(2nd edition) he states the following in the section on Einstein's Locality Principle and Bell's Inequality (page 241): "We derive Bell's inequality within ...
1
vote
2answers
204 views

What is 'reality' in physics? [closed]

I’m trying to find a definition of reality that fits with current mainstream physics but avoids any subjectivity (as with the idea that ‘consciousness causes collapse’, or with the ‘many worlds’ idea ...
-5
votes
1answer
196 views

Proving which QM interpretation is correct [closed]

Let's assume that the existence of gravitons is theoretically proven or they are detected by LHC could one interpretaion be proven correct?
0
votes
0answers
94 views

How can the Mach-Zehnder interferometer results be consistent with an epistemic view on the wavefunction (WF)?

If the epistemic view on WF is that something is happening in the mind of the observer (e.g. he observed something and then the WF changed for him) then how is this view consistent with the results ...
0
votes
1answer
170 views

Realism and the Copenhagen interpretation [closed]

In the Copenhagen interpretation, if some device measures the state of a quantum system, finding some property of it to be equal to some value, X, then it is then assumed that all other quantum ...
1
vote
0answers
85 views

Is there any basis in stating there are different levels of 'locality' or 'reality', within physics or physical theories?

EPR’s reality criterion and quantum realism has this paragraph (the paper has 0 citations, and I'm personally happy to call this metaphysics, but still!): A popular interpretation of Bell’s theorem ...
-2
votes
2answers
181 views

In Pilot wave theory how far does the wave stretch?

The one thing I find difficult to understand is how far does the Pilot Wave extend. Does the Pilot Wave permeate through the entire universe?
-1
votes
1answer
397 views

If Pilot wave theory turns out to be the correct way of interpreting quantum mechanics what are the implications?

I've read a few articles on Pilot Wave theory. Part of the theory describes how particles have a deterministic path and particles can't be in two places at once. If this turned out to be true would ...
1
vote
1answer
208 views

In pilot wave theory where is the wave?

As a non specialist, for a single particle system it's easy to appreciate the concept of a pilot wave extending through all Euclidean space, guiding a particle which ends up at a location determined ...
4
votes
2answers
452 views

The Pusey, Barrett and Rudolph (PBR) theorem and “shut up and calculate”

I was looking around for a competent, recent, persuasive presentation of the "shut up and calculate" philosophy regarding interpretations of quantum mechanics, and google led me to Fuchs and Peres, "...
1
vote
1answer
68 views

Are contextual theories non-local and vice-versa?

I am wondering if every contextual theory that reproduces QM is NON-local and reciprocally. Otherwise, when is contextuality equivalent to non-locality? And moreover, how much nonlocality is encoded ...
2
votes
0answers
243 views

If correct, Bell's Theorem rules out local variables and suggests a superdeterministic for to the Universe?

If Bell's Theorem is correct and Quantum Mechanics cannot rely upon 'local variables'. Bell suggests that a probable solution is the existence of a Super-determined order upon the construct of our ...
0
votes
1answer
93 views

Are quantum properties really indeterminate, or just unknowable?

Early on, it seems like Heisenberg's uncertainty principle was regarded as a principle of ignorance. That is, it says what's possible to measure or to know, rather than what actually is. However, ...
2
votes
3answers
78 views

Is there an objective asymmetry between a collapsed and un-collapsed wave function?

In a quantum double slit experiment, one starts at t0 with a wave function that propagates through two slits, interferes, and probabilities for various positions at the final stage at t1 can be ...
1
vote
0answers
58 views

What's a comprehensive review of the implications of Bell-nonlocality on our notion of reality / Weltanschauung?

I am looking for a (preferably peer-reviewed) article that summarizes: the historic debates surrounding Bell-nonlocality, how nonlocality can/not be reconciled with our notation of reality, and ...
4
votes
2answers
772 views

What are non-local hidden variables?

It is said that Bell's Inequality basically denies all possible local hidden variables theories as solutions to entanglement but what does a non-local hidden variable theory mean and how does it get ...
1
vote
1answer
76 views

Can two distinct quantum universes ever have the same configuration, and what does it mean for many-worlds? [closed]

First, I hear that, on a whiteboard, one may casually invert causality and run time in reverse. Next, I hear that there are interpretations of QM, like Chaitin's Great Programmer interpretation or de ...
1
vote
2answers
590 views

Why is a wave function time dependent?

Why is a wave function time dependent? And what does it physically mean when the probability density density function is varying with time. I'm not getting how to physically interpret that. Will ...
2
votes
0answers
138 views

Is Bohmian mechanics incompatible with Leggett inequality?

As far as I know violation of Bell's theorem is not a problem for De Broglie–Bohm theory because this theory is explicitly nonlocal; But since the violation of Leggett inequality is considered to ...
0
votes
0answers
102 views

What is the current scientific consensus in case of violation of Leggett/Leggett–Garg inequality?

Please consider the following premises and correct me if I'm wrong in anyone: Based on the results of the experimental investigation of Bell's theorem and violation of the Bell's inequality, locality ...
1
vote
1answer
86 views

Resource recommendation for interpretation of quantum mechanics?

The jumping of the quantum state to one of the eigenstates of $Q$ is the process referred to as state-vector reduction or collapse of the wave function (where $Q$ is an observable). I used to think ...
7
votes
3answers
717 views

When light reflects off a mirror, does the wave function collapse?

This question is specific to the Copenhagen interpretation, which states that the wave function collapses on interaction. If we have a beam of light reflected off a mirror, whether you see this light ...
36
votes
4answers
3k views

What is the quantum mechanical definition of a measurement?

I hear the word "measurement" thrown around a lot in quantum mechanics, and I have yet to hear a scientific definition that makes sense. How do we define it?
1
vote
2answers
624 views

Does QFT re-interpret the meaning of the wave function of Schrodinger's equation?

I'm wondering if quantum field theory re-interprets the meaning of the wave function of Schrodinger's equation. But more specifically, I'm trying to understand how to explain the double slit ...
1
vote
0answers
160 views

Existence of joint probability distribution (hidden variables) for partially compatible measurements

Informal summary: If we have $n$ measurements out of which we apply at most $q$, and we know that up to $q$ measurements commute on a given starting state, is there a hidden variable model that ...
1
vote
1answer
46 views

Possible objection to hidden variables schema

I know that local hidden variable theories have been ruled out by Bell inequalities experiments, but I have a more fundamental objection that I did not found discussed in the literature. Let us ...
1
vote
2answers
379 views

How does the de Broglie-Bohm picture explain the double-slit experiment with single particles?

If the particle has a single well-defined trajectory in the de Broglie-Bohm theory, how come that the interference pattern still appears even with single particles?
1
vote
1answer
81 views

Will a particle still be in a superposition state if unobserved from only the perspective of one observer?

In this scenario let us take a particle that can have either spin up or spin down. Let's say that observer 1 observed the particle's spin to be down. But observer 2 hasn't observed it yet. So, then ...
-2
votes
1answer
348 views

Does Bell Inequality favor De Broglie-Bohm?

From a purely mathematical standpoint, does Bell Inequality favor De Broglie-Bohm over other interpretations of QM? I have a superficial understanding of all this but it seems to me that Bell ...
0
votes
0answers
80 views

What's the Name of this QM Interpretation?

I've thought of an interpretation of quantum mechanics which I have so far been unable to find anywhere in the literature. Since the subject has been studied for so long, I am fairly sure that my ...