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mgkii
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- TL;DR Summary
- Despite clear proof and demonstrations that there are no local-hidden-variables at play, entanglement itself has to be local to start, even though un-entanglement happens at a distance. This seem non-symmetric and I want to learn more!
Hi. Over the years I've read LOT of "popular science" (i.e. non-textbook) books on entanglement, and on the explanations / objections / arguments Einsten, Bohr, Bohm and others had that still remain today. There's one aspect which never seems to get covered in these books and I wondered if anyone could point me to a source?
There seems to be a lack of symmetry in entanglement, in that for two particles to be entangled they have to have been at the same place at the same time to get entangled, even though the un-entanglement occurs at a distance. As far as I understand, there is no mechanism for two particles to become entangled at a distance.
I've read enough accounts of thought experiments and real experience designed to test Bell's inequality to understand (well - more accurately I should say accept !) there are no local hidden variables at play, and read accounts of Bohm's theory that if there are hidden-variables, then they have to be non-local. But again, there seems to be a lack of symmetry in that there can be no local-hidden variables, but there has to be something that goes on locally to cause the entanglement.
Any suggestions of further reading would be appreciated. I've tried and failed a couple of times to go the textbook route, but I really don't have the maths skills to keep up with the texts; I'm afraid I'm firmly stuck in the laymen / popular-science explanation field. I've also read enough Edward Frenkel to know I've probably committed a few sins with my use of the word symmetry - so sorry for that as well!
Thanks
Matt
There seems to be a lack of symmetry in entanglement, in that for two particles to be entangled they have to have been at the same place at the same time to get entangled, even though the un-entanglement occurs at a distance. As far as I understand, there is no mechanism for two particles to become entangled at a distance.
I've read enough accounts of thought experiments and real experience designed to test Bell's inequality to understand (well - more accurately I should say accept !) there are no local hidden variables at play, and read accounts of Bohm's theory that if there are hidden-variables, then they have to be non-local. But again, there seems to be a lack of symmetry in that there can be no local-hidden variables, but there has to be something that goes on locally to cause the entanglement.
Any suggestions of further reading would be appreciated. I've tried and failed a couple of times to go the textbook route, but I really don't have the maths skills to keep up with the texts; I'm afraid I'm firmly stuck in the laymen / popular-science explanation field. I've also read enough Edward Frenkel to know I've probably committed a few sins with my use of the word symmetry - so sorry for that as well!
Thanks
Matt
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