Graduate Barandes's Unistochastic Refomulation Applied to Entanglement Swapping

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The discussion revolves around Barandes's unistochastic reformulation applied to entanglement swapping involving four particles (Q, R, S, T) and three observers (A, B, C). It outlines a conventional entanglement swapping experiment where A and B perform spin measurements on Q and T, respectively, while C conducts a Bell-state measurement (BSM) or separable-state measurement (SSM) on R and S. The thread emphasizes the significance of causal locality, suggesting that A and B remain free from causal influences from C, S, and T during the measurements. It also highlights the need for indistinguishable states for successful swaps and discusses potential discrepancies in measuring outcomes between BSM and SSM. The conversation aims to clarify the implications of these measurements on the understanding of causal relations in quantum mechanics.
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Morbert said:
I don't know if there are any use over and above standard QM yet. He has remarked that some of his colleagues. Barandes speculates on some possibilities in the timestamp below, but ultimately it is all speculative for now.

[edit] - Fixed timestamp

I know he also said that he is working in a draft of an example calculation, I'm waiting for that...
 

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