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arXiv · 2111.09082

A statistical quasi-particles thermofield theory with Gaussian environments: System-bath entanglement theorem for nonequilibrium correlation functions

Yao Wang·Zi-Hao Chen·Rui-Xue Xu·Xiao Zheng·YiJing Yan
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Abstract

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.

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Yao Wang, Zi-Hao Chen, Rui-Xue Xu, Xiao Zheng, YiJing Yan. 2021-11-17. A statistical quasi-particles thermofield theory with Gaussian environments: System-bath entanglement theorem for nonequilibrium correlation functions. https://doi.org/10.1063/5.0094875

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