Universal Property of Quantum Measurements of Equilibrium Fluctuations and Violation of Fluctuation-Dissipation Theorem
Universal Property of Quantum Measurements of Equilibrium Fluctuations and Violation of Fluctuation-Dissipation Theorem
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平衡涨落量子测量的普遍性质和涨落耗散定理的违反
DOI：
10.1103/physrevlett.117.010402
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Fujikura and A. Shimizu
中科院分区：
文献类型：
--
作者：
K. Fujikura and A. Shimizu
对于宏观量子系统，我们研究了当宏观变量的平衡涨落以一种尽可能接近经典理想测量的理想方式测量时所测量的东西。我们发现，对于这种测量，总是获得对称化的时间关联。作为一个重要的推论，我们指出，即使以这种理想的方式进行测量，涨落耗散定理作为宏观量子系统中观测量之间的关系也是部分违反的。
For macroscopic quantum systems, we study what is measured when equilibrium fluctuations of macrovariables are measured in an ideal way that mimics classical ideal measurements as closely as possible. We find that the symmetrized time correlation is always obtained for such measurements. As an important consequence, we show that the fluctuation-dissipation theorem is partially violated as a relation between observed quantities in macroscopic quantum systems even if measurements are made in such an ideal way.