Quantum mechanics of open systems: Dissipaton theories

Y Wang, YJ Yan - The Journal of Chemical Physics, 2022 - pubs.aip.org
This Perspective presents a comprehensive account of the dissipaton theories developed in
our group since 2014, including the physical picture of dissipatons and the phase–space …

[HTML][HTML] Recent advances in fermionic hierarchical equations of motion method for strongly correlated quantum impurity systems

J Cao, L Ye, R Xu, X Zheng, Y Yan - JUSTC, 2023 - justc.ustc.edu.cn
Investigations of strongly correlated quantum impurity systems (QIS), which exhibit
diversified novel and intriguing quantum phenomena, have become a highly concerning …

Nonequilibrium work distributions in quantum impurity system–bath mixing processes

H Gong, Y Wang, X Zheng, RX Xu… - The Journal of Chemical …, 2022 - pubs.aip.org
The fluctuation theorem, where the central quantity is the work distribution, is an important
characterization of nonequilibrium thermodynamics. In this work, based on the dissipaton …

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

Y Wang, ZH Chen, RX Xu, X Zheng… - The Journal of Chemical …, 2022 - pubs.aip.org
For open quantum systems, the Gaussian environmental dissipative effect can be
represented by statistical quasi-particles, namely, dissipatons. We exploit this fact to …

Dissipatons as generalized Brownian particles for open quantum systems: Dissipaton-embedded quantum master equation

X Li, Y Su, ZH Chen, Y Wang, RX Xu… - The Journal of …, 2023 - pubs.aip.org
Dissipaton theory had been proposed as an exact, nonperturbative approach to deal with
open quantum system dynamics, where the influence of the Gaussian environment is …

Multimode Brownian oscillators: Exact solutions to heat transport

XH Tong, H Gong, Y Wang, RX Xu… - The Journal of Chemical …, 2023 - pubs.aip.org
In this work, we investigate the multimode Brownian oscillators in nonequilibrium scenarios
with multiple reservoirs at different temperatures. For this purpose, an algebraic method is …

Open quantum systems with nonlinear environmental backactions: Extended dissipaton theory vs core-system hierarchy construction

ZH Chen, Y Wang, RX Xu, YJ Yan - The Journal of Chemical Physics, 2023 - pubs.aip.org
In this paper, we present a comprehensive account of quantum dissipation theories with the
quadratic environment couplings. The theoretical development includes the Brownian …

Generalized system–bath entanglement theorem for Gaussian environments

Y Su, Y Wang, RX Xu, YJ Yan - The Journal of Chemical Physics, 2024 - pubs.aip.org
The entanglement between system and bath often plays a pivotal role in complex systems
spanning multiple orders of magnitude. A system–bath entanglement theorem was …

Imaginary-time hierarchical equations of motion for thermodynamic variables

J Zhang, Y Tanimura - The Journal of Chemical Physics, 2022 - pubs.aip.org
The partition function (PF) plays a key role in the calculation of quantum thermodynamic
properties of a system that interacts with a heat bath. The imaginary-time hierarchical …

Nonequilibrium Kondo regime current noise spectrum of quantum dot systems with the single impurity Anderson model

H Mao, J **, S Wang, YJ Yan - The Journal of Chemical Physics, 2021 - pubs.aip.org
We investigate the nonequilibrium current noise spectrum of single impurity Anderson model
quantum dot systems on the basis of the accurate dissipation equation of motion …