
editor wrote a new post, Weekly Papers on Quantum Foundations (37) 4 months, 1 week ago
When is a set of questions to nature together with sharp answers to those questions in onetoone correspondence with a set of quantum states?. (arXiv:1909.08834v1 [quantph])
上午9:10

quantph upd […] 
editor wrote a new post, Weekly Papers on Quantum Foundations (36) 4 months, 2 weeks ago
Classical causal models cannot faithfully explain Bell nonlocality or KochenSpecker contextuality in arbitrary scenarios. (arXiv:1909.05434v1 [quantph])
下午12:56

quantph updates on arX […] 
editor wrote a new post, Weekly Papers on Quantum Foundations (35) 4 months, 3 weeks ago
Proposal for a new quantum theory of gravity IV: Black hole entropy from noncommutative geometry and spontaneous localisation. (arXiv:1909.02434v1 [grqc])
下午12:42

quantph updates on arX […] 
editor wrote a new post, Weekly Papers on Quantum Foundations (34) 4 months, 4 weeks ago
The Frustration of being Odd: How Boundary Conditions can destroy Local Order. (arXiv:1908.10876v1 [condmat.statmech])
上午10:25

quantph updates on arXiv.orgAuthors: Vanja Mari […]

editor wrote a new post, Weekly Papers on Quantum Foundations (33) 5 months ago
Weak Gravitational Field Effects on Optical Bell Tests. (arXiv:1908.08179v1 [quantph])
下午12:23

quantph updates on arXiv.orgAuthors: M. RiveraTapia, A. Delgado, G. F. Rubila […]

editor wrote a new post, Weekly Papers on Quantum Foundations (32) 5 months, 1 week ago
Critical look at the timeenergy uncertainty relations. (arXiv:1908.05273v1 [quantph])
上午9:48

quantph updates on arXiv.orgAuthors: K. Urbanowski
The Heisenberg and Mand […]

On the E,t uncertainty relations:
Yes, the best derivation I know is that of Schwinger, who assumes an H and H_0. H generates transitions in the levels of H_0, and he estimates the time for moving Delta E in H_0 to be Delta E over hbar. Certainly not rigorous. In relativistic quantum theory (e.g. my book with Springer 2015) it is established rigorously since, long with x and p. t and E are observables in the covariant theory and have covariant commutation relations. Larry Horwitz


editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 2 weeks ago
Thanks, Ruth!

editor replied to the topic Beyond Bell? in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 2 weeks ago
Thanks for your useful comments, Jerry!

editor wrote a new post, Weekly Papers on Quantum Foundations (31) 5 months, 2 weeks ago
Do the EPR correlations pose a problem for causal decision theory?
上午8:00

Latest Results for SyntheseAbstract
We argue that causal decision theory (CDT) is no worse off than evi […] 
editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 2 weeks ago
Thanks, Ruth. So, the collapse is not the superposition psi1 + psi2 randomly becomes psi1 or psi2 for the forwardpropagating state or the the backwardpropagating state?

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Thanks, Ruth! I will need more time to understand your RTI. As far as I see, your RTI does not assume a real collapse of the real wave fucntions. Maybe in RTI the wave function is not ontic?

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Ok, Ruth. I see. Then RTI is not really the usual collapse theory such as the GRW model for onevector. So, in RTI, there is no real dynamical collapse of the wave function. Then my analysis of collapse theories does not apply to RTI.
Now I think my analysis of unitary quantum theories will apply to RTI. See my paper section about the…[Read more]

editor replied to the topic Beyond Bell? in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
So, you also agree that “in the second scenario, in which Bob’s measurement precedes (in the lab frame) all of Alice’s measurements”, “Since Alice cannot know Bob’s outcome before that event enters her back light cone, all she can predict with certainty at points on her worldline before making those measurements is that, whatever they are, they…[Read more]

editor replied to the topic Beyond Bell? in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Thanks for your clarification, Richard!
But I cannot agree with you. I think the Born Rule must be applied at a time, while this would not necessarily introduce a preferred frame in relativity as some people think, although my new argument says the opposite.
The reason is that if the Born Rule is not applied at a time for a joint measurement of…[Read more]

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
You said “no way for Alice to check that when she detected, say particle #25, that Bob did not get that particle, because in order to do that, the two would have to exchange classical information faster than light.”
Yes, you are correct. But this is not necessary to verify the anticorrelation. They just need to record the results, and then…[Read more]

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Thanks, Ruth! I will need to undertand your idea more deeply.
Here is what I thought. Suppose ALice measures the particle in box 1, and then Bob meqasures the particle in box 2. These two measurements are spacelike and almost simutaneous. Then, when Alice have dectected the particle in box 1, the superpostion should collapse also in the remote…[Read more]

editor replied to the topic Beyond Bell? in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Hi Richard,
Thanks for your comments! In your paper, you said:
“In the second scenario (i.e. Bob precedes Alice) Gao argued that the Born rules yields probability 1 for the sequence of outcomes of Alices repeated zspin measurements in which every outcome is the opposite of Bobs single outcome of a measurement at point 3, and probability 0 t…[Read more]

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
I think the issue is not really related to the detials. Consider a particle is in a superposition of two wellseparated boxes. When one measures the particle in one box, then the whole superposition collapses to the state in one of the two boxes. Now if the collapses of the superposition in the two boxes are not spacelike seperated in any frame,…[Read more]

editor wrote a new post, Beyond Bell? 5 months, 3 weeks ago
In a recent archive post ([1]) Shan Gao has argued that quantum theory is incompatible with relativity. He calls this a new proof beyond Bells theorem, arguing elsewhere ([2]) that it closes the su […]

editor replied to the topic Quantum theory is incompatible with relativity: A proof beyond Bell's theorem in the forum 2019 International Workshop: Beyond Bell's theorem 5 months, 3 weeks ago
Hi Ruth,
Thanks for your interesting comments! In my paper, I said:
“In collapse theories, the collapse of the wave function is simultaneous in different regions of space in a preferred Lorentz frame.”
I think this is correct. Otherwise, if the collapses of the wave function in different regions of space are not spacelike seperated in any…[Read more]
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On the arrow of time; See Y. Strauss, J. Silman, S. Machnes, and L.P. Horwitz, Comptes Rendus Mathematique 349, 1117 (2011)