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arXiv 0908.1032quant-ph
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Wheelers光子延迟选择实验中全哪路信息与干涉的共存

Coexistence of full which-path information and interference in Wheelers delayed choice experiment with photons

K. Michielsen, S. Yuan, S. Zhao, F. Jin, H. De Raedt

摘要:

我们提出了一个计算机模拟模型,它是惠勒延迟选择实验的实验实现的一对一副本,该实验采用单光子源和马赫-曾德尔干涉仪,马赫-曾德尔干涉仪由50/50输入分束器和具有可调反射系数$R$的可变输出分束器组成(V. Jacques { \sl et al.},物理修订信函100,220402(2008))。对于$0\le R\le 0.5$,发现干涉可见度$V$和路径可扩展性$D$(量化哪个路径信息WPI的参数)的实验测量值满足互补关系$V^2+D^2\le 1$,从而允许获得部分WPI,同时保持具有有限可见度的干涉。模拟模型完全基于实验事实,满足爱因斯坦的局部因果性标准,不依赖于任何量子理论或概率论的概念,定量地再现了从量子理论计算的平均值。我们的结果证明,它是可能的,以粒子的实验,即使D=0,V=1,可以有完整的WPI,因此,关系$V^2+D^2\le 1$不能被视为量化的互补性的概念。

英文摘要:

We present a computer simulation model that is a one-to-one copy of an experimental realization of Wheeler's delayed choice experiment that employs a single photon source and a Mach-Zehnder interferometer composed of a 50/50 input beam splitter and a variable output beam splitter with adjustable reflection coefficient $R$ (V. Jacques {\sl et al.}, Phys. Rev. Lett. 100, 220402 (2008)). For $0\le R\le 0.5$, experimentally measured values of the interference visibility $V$ and the path distinguishability $D$, a parameter quantifying the which-path information WPI, are found to fulfill the complementary relation $V^2+D^2\le 1$, thereby allowing to obtain partial WPI while keeping interference with limited visibility. The simulation model that is solely based on experimental facts, that satisfies Einstein's criterion of local causality and that does not rely on any concept of quantum theory or of probability theory, reproduces quantitatively the averages calculated from quantum theory. Our results prove that it is possible to give a particle-only description of the experiment, that one can have full WPI even if D=0, V=1 and therefore that the relation $V^2+D^2\le 1$ cannot be regarded as quantifying the notion of complementarity.

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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