All Questions
23 questions
4votes
2answers
384views
Clarification regarding argument in EPR paper
I read through the original EPR paper recently and ran into some confusion regarding the central argument. As I understand it, the authors assert the following two definitions: Assumption 1: A ...
1vote
1answer
112views
Einstein–Podolsky–Rosen (EPR) paradox and Everett interpretation [closed]
Can Einstein–Podolsky–Rosen paradox be satisfactory explained outside of the Everett interpretation of QM? Can it be easily explained within Everett interpretation?
- 176
5votes
9answers
1kviews
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 ...
0votes
1answer
122views
Is there any minimalistic version of superdeterminism theory?
Superdeterminism is one wild conjecture which is an alternative to the standard quantum mechanical interpretation and preserves local realism Superdeterminism seems to be too much of a stretch. If ...
- 107
1vote
1answer
153views
Clarification on the Premises of the Einstein-Podolsky-Rosen Argument
In their famous EPR paper, Einstein, Podolsky and Rosen argue that quantum mechanics does not provide a complete description of physical reality. To do this, they make two key assumptions: in a ...
- 13
7votes
3answers
204views
Has quantum collapse been ruled out?
This morning, a new arXiv paper 2105.13519 appeared providing detail of an EPR steering experiment showing that if it is assumed that the EPR steering requires quantum collapse, then more than one bit ...
- 16.5k
4votes
3answers
499views
Many Worlds locality and EPR experiment
I've read in Sean Carroll's book (Something Deeply Hidden) that the Many-Worlds interpretation of quantum mechanics might be the only way to avoid instantaneous effects of entanglement, by having the ...
- 41
3votes
2answers
555views
When people say Bell's theorem implies either non-local realism or local non-realism, what do they mean precisely by "realism"?
From the EPR article: "If, without in any way disturbing a system, we can predict with certainty (i.e., with probability equal to unity) the value of a physical quantity, then there exists an ...
- 196
1vote
0answers
105views
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 ...
- 11
3votes
1answer
254views
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 ...
user4552
3votes
1answer
524views
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 ...
- 133
1vote
0answers
114views
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 ...
5votes
1answer
1kviews
Bell's theorem and how it solves the EPR paradox
Could someone explain to me how Bell's theorem solves the EPR paradox and 'spooky action at a distance'? From what I understand, when measuring a state, say spin up in the x direction, the wave ...
-1votes
1answer
121views
Since photons do not experience time (nor distance in that case), why did Einstein think it was "spooky action at a distance"? [closed]
A photon travels at c, so it experiences no time or distance. I imagine from the photon's perspective, it's rather just like a simple dot on some kind of 4D manifold. So it begs the question of why ...
- 484
8votes
4answers
2kviews
Does the following experiment disprove the Copenhagen interpretation?
I have a question concerning the scientific experiment proposed in the following video, (25:00-29:00) titled the "EPR Thought Experiment", which bears resemblance to the quantum eraser experiment. ...
- 91
