The puzzling tension between faster-than-light communication and quantum mechanics
We look at a paper by Nicolas Gisin
https://arxiv.org/abs/1407.8122
which considers a variation of the superluminal (faster-than-light) communication setup where quantum measurements are made of an entangled pair of qubits. In this paper, an ensemble of qubits is considered, so that a macroscopically large signal is obtained on Bob's side. This reformulates a famous tension that exists between relativity and quantum mechanics, where it is consistent, but for entirely different reasons.
Speed of spooky action at a distance
https://www.nature.com/articles/natur...
Our book which contains the definition of spin Q-functions
https://www.cambridge.org/core/books/...
https://arxiv.org/abs/2007.14601
#quantummechanics #superluminal #fasterthanlight
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