A testable prediction of the no-signalling condition using a variant of the EPR-Bohm example

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• 作者：Dipankar Home^a ; ^{dhome@bosemain.boseinst.ac.in} ; Ashutosh Rai^b ; ^{arai@bose.res.in} ; A.S. Majumdar^b ; ^{archan@bose.res.in}
• 关键词：Entanglement ; EPR ; No-signalling
• 刊名：Physics Letters A
• 出版年：2013
• 出版时间：15 February, 2013
• 年：2013
• 卷：377
• 期：7
• 页码：540-545
• 全文大小：204 K

文摘

Predictive power of the no-signalling condition (NSC) is demonstrated in a testable situation involving a non-ideal Stern-Gerlach (SG) device in one of the two wings of the EPR-Bohm entangled pairs. In this wing, for two types of measurement in the other wing, we consider the spin state of a selected set of particles that are confined to a particular half of the plane while emerging from the SG magnetic field region. Due to non-idealness of the SG setup, this spin state will have superposing components involving a relative phase for which a testable quantitative constraint is obtained by invoking NSC, thereby providing a means for precision testing of this fundamentally significant principle.