Saturday, 11 August 2018

quantum mechanics - spooky nonlocal communication, or bad abstract?


I'm referring to this recent paper, "Experimental Proof of Nonlocal Wavefunction Collapse for a Single Particle Using Homodyne Measurements" by Fuwa et al. published in Nature Communications. Non-paywalled arXiv version here. From the abstract:



...the choice of measurement in one lab really causes a change in the local quantum state in the other lab



My understanding of entanglement (whether it is two particles, or one as in this article) is that Bob's measurement can be affected by the (uncontrollable) result of Alice's measurement, but not her choice of measurement. (the latter would seem to enable a form of non-local communication). So is it just a badly-worded abstract? (the full article uses similar language)




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