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.

123 questions with no upvoted or accepted answers
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9
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3answers
503 views

How would a realist interpretation of the Mermin-Peres square look like?

How would a realist interpretation of the Mermin-Peres square with counterfactual definiteness and the existence of states prior to measurements look like?
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264 views

Is zitterbewegung physical or not?

It appears that zitterbewegung, a frequency associated with the total energy of a particle or system, is widely considered to be an unphysical quantity (e.g., Kobakhidze et.al.), @Lubos Motl, McMillan)...
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1answer
608 views

Is the trajectory of a quantum particle a well defined concept and how does this depend on the interpretation of quantum mechanics?

A common statement about quantum physics is that the "trajectory" of a particle is no longer a well defined concept because of the uncertainty relations for position and momentum. If one interprets ...
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214 views

Free Will Theorem question

The Kochen-Specker Theorem says, if I understand it correctly, that the results of spin measurements cannot be predetermined independent of measurement. They get to this conclusion by describing 33 ...
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1answer
225 views

Is it possible to reproduce the energy spectrum of quantum chaos using classical cellular automata?

Is it possible to reproduce the energy spectrum of quantum chaos using classical cellular automata? It's hardly impressive to reproduce harmonic oscillators.
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1answer
409 views

Calculate the entropy per atom in Bohmian Mechanics

Bohmian mechanics description of a large number of interacting atoms would require a large phase space due to the large number of classical degrees of freedom. The entropy per atom is given as the ...
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209 views

How can the pre-measurement be fulfilled?

In the decoherence program, the pre-measurement refers to the evolution in which the system and apparatus form a Schmidt state. In Maximilian Schlosshauer's review article(2005), I read "the linearity ...
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79 views

Are there any connections between James–Stein estimator and quantum mechanics?

Very nice statement from wiki: When three or more unrelated parameters are measured, their total MSE can be reduced by using a combined estimator such as the James–Stein estimator; whereas when ...
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0answers
60 views

How does the EPE-DH interpretation of quantum mechanics account for interaction-free measurement?

The extended probability ensemble decoherent histories (EPE-DH) interpretation of quantum mechanics proposed by Murray Gell-Mann and James Hartle posits that there is one real fine-grained history of ...
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161 views

Are all instances of quantum non-locality problem artifacts of the use of classical concepts in quantum physics?

Consider experiments involving entangled spins, say two-spin 1/2 particles in the singlet state: $$\left|\psi\right> =\frac{1}{\sqrt{2}}\left[\left|\uparrow\downarrow\right> - \left|\downarrow\...
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243 views

Is there a video of a double-slit experiment using walking oil droplets (aka dotwaves)?

I've heard there have been experiments with walking droplets in a double-slit setup, and I've seen videos of many of the other quantum phenomenons walking droplets can emulate, but I can't find one of ...
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110 views

Are frequency and likelihood the same across the multiverse?

My probability text distinguishes between two interpretations of probability values: the frequency of occurrence "as percentage of success in a moderately large number of similar situations" (coin ...
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204 views

How to explain Tsirelson's inequality using extended probabilities?

How to explain Tsirelson's inequality using extended probabilities? Some people have tried explaining the Bell inequalities using extended probabilities. For instance, a pair of entangled photons ...
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590 views

Does the extended probability ensemble interpretation of quantum mechanics make any sense?

Gell-Mann and Hartle came up with the extended probability ensemble interpretation over here. Basically, they extended probability theory to include real numbers which may be negative or greater than ...
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46 views

Photon Wave Function in Position Space

Last year I did some research on the possibility of defining a PWF ( photon wave function) however there are many things that I haven't understood since then. So I want to ask what are your toughts on ...
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44 views

Does Quantum Darwinism select against the Frauchiger-Renner inconsistent states?

Zurek's Quantum Darwinism is based on an environment induced superselection of pointer states, within which entanglement plays an essential role. Similar arguments can be made related to Horodecki's ...
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1answer
159 views

Is Quantum Darwinism considered an interpretation of Quantum Mechanics?

I did not see Quantum Darwinism in the Wikipedia article on the interpretations of Quantum Mechanics but there is a Wikipedia article on Quantum Darwinism so this prompted my question. As for example ...
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104 views

Why doesn't Wigner's friend interact with the system?

So I was recently modelling something that turned out to be basically Wigner's friend. I saw there were some differences (in the Wiki page) in how it was modelled: Namely, that Wigner's friend ...
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101 views

Is there an official list of the postulates of quantum mechanics?

Having been looking at lecture notes, online sources and books, the list of postulates of quantum mechanics seems to vary. For instance, some sources (my lecture notes, for instance) refer to $|\...
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81 views

Information Centric Interpretation of the Delayed Choice Experiment

The photon travels from the emmitter to the detector. Along the way it bounces off a few mirrors and off or through a beam splitter or two. This journey takes time, but only from OUR perspective/frame....
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42 views

Spekken toy model: measurement of spin in any direction

Spekkens' toy model [1] can handle the measurement of a spin 1/2 along the directions $x$, $y$ and $z$. Unless I am missing something, it can't handle measurement in any direction. Would there be a ...
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319 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 ...
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168 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 ...
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117 views

Dirac-like formulation of quantum electrodynamics

For classical mechanics there is a newtonian formulation (calculating accelerations and integrating to get velocities and positions). There is also an equivalent Lagrangian formulation (finding a path ...
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67 views

“What is a thing?” — Coecke versus Kastner

The subject's from Coecke's https://arxiv.org/abs/0803.0417 and my question's essentially to "compare and contrast" that with Kastner's https://arxiv.org/abs/1707.09034 which appeared today. Seems to ...
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126 views

Confusion by Murray Gell Mann video and Bell's Theorem

I'm trying to understand 3:02 in this video: https://www.youtube.com/watch?v=AlIlkn3OxMI&t=184s He seems to be saying that the measurement of a property one photon has no effect on the other. So ...
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2answers
214 views

Is 'interpretation' in quantum mechanics the same as 'interpretation' in probability?

I heard all 'interpretations' of quantum mechanics give exactly the same answer to every measurement so they are all equally correct. Is that the same 'interpretations' as in probability? Context: ...
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396 views

Testing Many-Worlds Interpretation (MWI) with a causality-violating configuration of “superluminal cables”

Suppose we managed to arrange a causality-violating transmission of data with hypothetical “superluminal cables” (SLC; see both links for respective descriptions) and expect, similarly to ideas ...
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216 views

Are universally valid possibilistic theories possible?

This is a spin-off of the following question: Are Thomas Breuer's subjective decoherence and Scott Aaronson's freebits with Knightian freedom the same things in essence? Given that Thomas ...
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123 views

Is relational QM experimentally distinguishable from standard QM?

Some people advocate for relational quantum mechanics, which is an interpretation (or at least Wikipedia calls it an interpretation) of QM where quantum states are thought of as representing a ...
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697 views

Uncertainty Principle and Bohmian mechanics

The Uncertainty Principle is a relationship between measurements of pairs of attributes, position and momentum, as well as energy and time. Perfect precision of one attribute's measurement leads to a ...
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74 views

Is it possible to detect subjective decoherence? If yes, how?

In his paper from 1994 Thomas Breuer describes a phenomenon of subjective decoherence (p. 43). I wonder whether it can be measured, and if yes, how. I also wonder whether it would allow to create an ...
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146 views

What is the difference between Cramer and Vaidman?

Two very interesting new papers on arXiv last night by Lev Vaidman and friends lead me to ask about the differences between Cramer's transactional interpretation of quantum mechanics (TIQM) and the ...
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Why would the classical (local) correlation in Bell's experiment rule out the cosine of the angle?

This question expands on a specific detail of this previous question: Why would classical correlation in Bell's experiment be a linear function of angle? I would have commented on/answered that ...
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77 views

How does virtual photon exchange lead to the attraction of opposite charges?

This wonderful page in the physics FAQ, from 1994, by Matt McIrvin http://math.ucr.edu/home/baez/physics/Quantum/virtual_particles.html explains how the exchange of virtual photons leads to ...
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69 views

Many worlds & non-local correlation

I just finished Sean Carroll's Something Deeply Hidden, and found it the best explanation of MWI I've ever seen, and even find that I have no good arguments against it; the parts I understand seem ...
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50 views

De-Broglie Wavelength and the Pilot Wave Theory

I researched a lot of questions on De-Broglie waves on this website and discovered a dense fog of confusion amongst everyone. Louis De-Broglie proposed "Matter Waves" and a simple equation describing ...
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62 views

Bohmian vs Copenhagen Interpretation

Is there any experiment that could settle the debate between De Broglie - Bohm Pilot Wave Theory and the Copenhagen Interpretation?
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Difference between multiphoton signal and, $n$-photon signal state

I was reading decoy state quantum key distribution article, by Lo et.al. (PRL paper , PRA paper). In this article, authors have discussed the possibility of photon number splitting attack due to ...
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49 views

ER=EPR, Entanglement and Subjectivity

ER=EPR refers to a conjectured connection between entanglement and Einstein-Rosen bridges. Consider the quantum teleportation circuit, where Alice ($A$) and Bob ($B$) make use of an entangled pair of ...
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26 views

Topos quantum theory and distributive logic

I am reading an introductory review on topos quantum theory https://arxiv.org/abs/1106.5660 where in the motivation part it says (emphasis is mine): As we can see the non realism of standard ...
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1answer
84 views

Is the Second Law a consequence of the Many Worlds principle?

I've done a bit of browsing on this subject, and haven't found any papers that directly address this question. Here's the idea: In the Many Worlds View (MWV), there is no loss of information from ...
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60 views

Universal wave function

Doesn't the existence of a Universal wave function allow one to extract a preferred space time foliation? There are plenty of papers that try and derive the preferred space time foliation from BM ...
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52 views

Scan Quantum mechanics: Status of current research

I recently stumbled on a new interpretation of Quantum mechanics, called Scan Quantum Mechanics, given by Beatriz Gato-Rivera. She suggests a quantity called quantum inertia, which divides the ...
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112 views

Measurement problem: Origin of probabilities in Many-Worlds Interpretation

As far as I can tell there appears to be an active group of academics (including the likes of Sean Carrol) who believe in the Many-Worlds Interpretation of quantum mechanics, but feel that the origin ...
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Have there been any papers on a relativistic relative state (“MWI”) interpretation of QM with continuous spectra?

I've read the original papers on the relative state interpretation ("MWI") of Quantum Mechanics. They seem compelling, but they only addressed a nonrelativistic system and operators with discrete ...
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100 views

Safer version of quantum suicide?

Quantum suicide imagines a gun which will shoot a person in a box, and this gun is rigged up to the release of radioactive decay which has a quantum probability of 50% chance of decaying or not ...
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92 views

Does Lucien Hardy's “Paradox” show that all realist interpretations of quantum mechanics cannot be made lorentz invariant?

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.68.2981 Reading the abstract he claims that if a realist interpretation claims to be lorentz invariant, it produces the wrong predictions. ...
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Justification for “which path” inference in Hardy's paradox?

I'm going over Hardy's paradox again recently and whenever I try to think about it I always get confused with the classical part of the analysis. Just as a brief summary, the setup of the paradox is ...
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55 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 ...