Physics Division, Institute of Nuclear Energy Research, Longtan, Taoyuan 32546, Taiwan.
Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan.
Sci Rep. 2014 Aug 22;4:6165. doi: 10.1038/srep06165.
Leggett-Garg inequalities (LGI) test the correlations of a single system measured at different times. Violation of LGI implies either the absence of a realistic description of the system or the impossibility of measuring the system without disturbing it. We investigate the violation of the Leggett-Garg inequality for a two level system under decoherence in a non-Markovian dephasing environment. We discuss the non-Markovian dynamics of the violation of LGI at zero temperature and also at finite temperature for different structured environments. An enhanced quantum coherence is shown through the violation of Leggett-Garg inequality in the strong non-Markovian regime of the environment.
利格特-加尔格不等式（LGI）检验在不同时间测量的单个系统的相关性。LGI 的违反意味着要么没有对系统的现实描述，要么不可能在不干扰系统的情况下测量系统。我们研究了在非马尔可夫退相环境下，对两层系统的 LGI 违反情况。我们讨论了在零温度和不同结构环境下有限温度下 LGI 违反的非马尔可夫动力学。通过在环境的强非马尔可夫区域违反利格特-加尔格不等式，显示出增强的量子相干性。
