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首页> 外文期刊>Bulletin of the American Physical Society >APS -48th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics - Event - Distinguishing time-reversible from time-irreversible processes with Interference patterns.
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APS -48th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics - Event - Distinguishing time-reversible from time-irreversible processes with Interference patterns.

机译：APS-APS原子，分子和光学物理分部第48届年会-事件-区分时间可逆与时间不可逆的过程，并具有干扰模式。

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In interference experiments, coherence is often incomplete. Coherence can be lost by dephasing or decoherence processes. The former is associated with time-reversible processes, while the latter is associated with time-irreversible processes. Even though there is a significant difference, the interference patterns appear similar; the pattern are more or less washed out. Entropy is a convenient measure of time reversibility. However, to determine the entropy, the coherence terms, i.e., the off-diagonal elements of the density matrix, need to be known. At first glance, it seems not possible to determine the reversibility from an interference pattern that provides only knowledge of the diagonal elements of the density matrix. Inspired by the lens-less imaging experiments by Gao et al.[1], we show by theoretical analysis that the spatial correlation function of repeated measurements of the interference pattern allows one to assess the reversibility. The second-order correlation function is proportional to the Fourier transformation of the spatial pattern of the double slits, but only if a dephasing process disturbs the wave. For a decoherence process the interference pattern is not recovered. This provides a method to establish time-reversibility, or the absence thereof, in matter-wave experiments. [1] Rui-Feng L, Xin-Xing Y, Yi-Zhen F, et al. Subwavelength Fourier-transform imaging without a lens or a beamsplitter[J]. Chinese Physics B, 2014, 23(5): 054202.
机译：在干扰实验中，相干性通常是不完整的。相移或相干过程可能会丢失相干性。前者与时间可逆过程相关，而后者与时间不可逆过程相关。即使存在显着差异，干扰模式也看起来相似。图案或多或少被洗掉了。熵是时间可逆性的便捷度量。但是，为了确定熵，需要知道相干项，即密度矩阵的非对角线元素。乍看之下，似乎无法从仅提供密度矩阵对角元素知识的干涉图样确定可逆性。受高等人[1]的无透镜成像实验的启发，我们通过理论分析表明，重复测量干涉图样的空间相关函数可以评估可逆性。二阶相关函数与双缝隙空间图案的傅立叶变换成比例，但前提是移相过程会干扰波。对于退相干过程，干扰模式无法恢复。这提供了一种在物质波实验中建立时间可逆性或不存在时间可逆性的方法。 [1] L芮峰，Y Xin-Xing，F Yi-Zhen F等。关键词：亚波长傅里叶变换成像，无透镜或分束器中国物理B，2014，23（5）：054202。

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