Questions tagged [non-locality]
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241 questions
0 votes
3 answers
325 views
Does Quantum Mechanics (QM) Violate Propositional Counting Logic (PCL)? [closed]
I have been in discussion with folks about the last 10 mins of the MIT Lecture 2 - Quantum Mechanics course. Theorem. Given three propositional statements (about objects), A, B, C, and given a finite ...
- 284
0 votes
0 answers
62 views
Modelling chaos with Edward scattering
A typical chaotic Hamiltonian, such as those from the GUE/GOE ensembles, is often considered unphysical because it involves non-local many-body interactions. Now, consider the Edwards model, which ...
- 31
-2 votes
1 answer
204 views
Does the locality of spacetime still exist if only massless particles exist? [closed]
Suppose a universe exists in which only massless particles are present. Say only gravitons and photons. Massless particles (luxons) move on a light-like trajectory and there exist no frames in which ...
-1 votes
1 answer
324 views
Does quantum entanglement really involve influencing particles "across distances", or is it just a correlation that we observe after measurement? [duplicate]
I’ve been learning about quantum entanglement and I’m struggling to understand the full picture. Here’s what I’m thinking: In entanglement, we have two particles (let's call them A and B) that are ...
- 113
0 votes
1 answer
185 views
Time non-locality in quantum mechanics [closed]
In non-relativistic quantum mechanics, the spectrum of a particle in a 1D closed box is $E_{n} = \frac{n^{2}\pi^{2}\hbar^{2}}{2mL^{2}}$, in order to get this result one has to consider boundary ...
- 914
5 votes
4 answers
1k views
An inconsistency in the CHSH inequality
I saw this paper recently https://arxiv.org/abs/2409.01275 Correct me if Im wrong, but in short it says that all the experimental data so far cannot be used to dismiss local hidden variable theories. ...
- 240
5 votes
9 answers
2k views
Doesn't nonlocality follow from nonrealism in the EPR thought experiment and Bell tests? (Or: How is nonlocal realism viable?)
Original Post, 9/13/2024 It is often said that the Bell test disqualifies "local realistic" theories from quantum physics. But some people emphasize the issue of realism, while others ...
- 123
3 votes
1 answer
268 views
Bohmian mechanics, Leggett inequality, realism and nonlocality
Very often it is said that the Bell inequality has ruled out the possibility of hidden variables (HV) in QM. This is incorrect since Bell inequality has ruled out local hidden variables: nonlocal HV ...
- 315