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arXiv quant-ph/0602226quant-ph
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选择前和选择后,弱值和上下文

Pre- and post-selection, weak values, and contextuality

Jeff Tollaksen

摘要:

通过分析上下文的概念(贝尔-科亨-斯派克)的前和后选择(PPS),它是可能的,以一种新的和令人惊讶的方式分配明确的价值观。物理原因,这些任务的限制。当测量不干扰前和后的选择(即弱测量),然后新的实验方面的上下文可以证明,包括一个证明,每一个PPS悖论与明确的预测意味着上下文。然而,这些测量的某些结果(偏心弱值,例如频谱外的负值)不能用“类经典”隐变量理论来解释。

英文摘要:

By analyzing the concept of contextuality (Bell-Kochen-Specker) in terms of pre-and-post-selection (PPS), it is possible to assign definite values to observables in a new and surprising way. Physical reasons are presented for restrictions on these assignments. When measurements are performed which do not disturb the pre- and post-selection (i.e. weak measurements), then novel experimental aspects of contextuality can be demonstrated including a proof that every PPS-paradox with definite predictions implies contextuality. Certain results of these measurements (eccentric weak values with e.g. negative values outside the spectrum), however, cannot be explained by a "classical-like" hidden variable theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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