Wang Yao, Chen Zi-Hao, Xu Rui-Xue, Zheng Xiao, Yan YiJing
Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
J Chem Phys. 2022 Jul 28;157(4):044102. doi: 10.1063/5.0094875.
For open quantum systems, the Gaussian environmental dissipative effect can be represented by statistical quasi-particles, namely, dissipatons. We exploit this fact to establish the dissipaton thermofield theory. The resulting generalized Langevin dynamics of absorptive and emissive thermofield operators are effectively noise-resolved. The system-bath entanglement theorem is then readily followed between an important class of nonequilibrium steady-state correlation functions. All these relations are validated numerically. A simple corollary is the transport current expression, which exactly recovers the result obtained from the nonequilibrium Green's function formalism.
对于开放量子系统，高斯环境耗散效应可以由统计准粒子，即耗散子来表示。我们利用这一事实建立了耗散子热场理论。由此产生的吸收和发射热场算符的广义朗之万动力学有效地解决了噪声问题。然后，在一类重要的非平衡稳态关联函数之间很容易得出系统-环境纠缠定理。所有这些关系都通过数值验证。一个简单的推论是输运电流表达式，它准确地恢复了从非平衡格林函数形式主义获得的结果。
