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Delayed-choice experiments and the Bohm approach

机译:延迟选择实验和Bohm方法

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The delayed-choice experiments of the type introduced by Wheeler and extended by Englert, Scully, Sussmann and Walther (ESSW) (1992 Z. Naturf. a 47 1175-86), and others, have formed a rich area for investigating the puzzling behaviour of particles undergoing quantum interference. The surprise provided by the original delayed-choice experiment led Wheeler to the conclusion that 'no phenomenon is a phenomenon until it is an observed phenomenon', a radical explanation which implied that 'the past has no existence except as it is recorded in the present'. However Bohm et al (1985 Nature 315 294-97) have shown that the Bohm interpretation (BI) gives a straightforward account of the behaviour of the particle without resorting to such a radical explanation. The subsequent modifications of this experiment led both Aharonov and Vaidman (1996 Bohmian Mechanics and Quantum Theory: An Appraisal ed J T Cushing, A Fine and S Goldstein (Dordrecht: Kluwer) pp 141-54) and ESSW to conclude that the resulting Bohm-type trajectories in these new situations produce unacceptable properties. For example, if a cavity is placed in one arm of the interferometer, it will be excited by a particle travelling down the other arm. In other words, it is the particle that does not go through the cavity that gives up its energy! If this analysis is correct, this behaviour would be truly bizarre and could only be explained by an extreme non-local transfer of energy that is even stronger than that required in an Einstein, Podolsky and Rosen (EPR)-type process. In this paper, we show that this conclusion is not correct and that if the BI is used correctly, it gives a local explanation, which actually corresponds exactly to the standard quantum mechanics explanation offered by ESSW.
机译:由惠勒(Wheeler)引入并由恩格勒特(Englert),斯库利(Scully),苏斯曼(Sussmann)和沃尔瑟(Walther)(ESSW)(1992 Z. Naturf.a 47 1175-86)等人扩展的类型的延迟选择实验,形成了研究困惑行为的丰富领域。受到量子干扰的粒子。最初的延迟选择实验提供了令人惊讶的结果,惠勒得出这样的结论:“只有在观察到的现象之后,现象才是现象”,这是一种激进的解释,暗示着“过去不存在,除非被记录在现在。 '。但是,Bohm等人(1985 Nature 315 294-97)表明,在不求助于这种激进解释的情况下,Bohm解释(BI)给出了颗粒行为的直接解释。此实验的后续修改导致Aharonov和Vaidman(1996年《波姆力学与量子理论:鉴定》,JT Cushing,A Fine和S Goldstein(Dordrecht:Kluwer)第141-54页)和ESSW得出结论,即产生了Bohm型在这些新情况下,轨迹会产生无法接受的特性。例如,如果在干涉仪的一个臂中放置一个腔,则该腔将被沿另一臂向下移动的粒子激发。换句话说,是没有穿过空腔的粒子放弃了它的能量!如果这种分析是正确的,那么这种行为将是真正的怪异,只能用比爱因斯坦,波多尔斯基和罗森(EPR)型过程所需的能量更为极端的非局部能量转移来解释。在本文中,我们证明了该结论是不正确的,并且如果BI的使用正确,它将给出本地解释,实际上与ESSW提供的标准量子力学解释完全一致。

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