Simulating open quantum dynamics with time-dependent variational matrix product states: Towards microscopic correlation of environment dynamics and reduced system evolution

被引：87

作者：

Schroeder, Florian A. Y. N. ^{[1
]}

Chin, Alex W. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

RENORMALIZATION-GROUP; COHERENCE;

D O I：

10.1103/PhysRevB.93.075105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the development of an efficient many-body algorithm for simulating open quantum system dynamics that utilizes a time-dependent variational principle for matrix product states to evolve large system-environment states. Capturing all system-environment correlations, we reproduce the nonperturbative, quantum-critical dynamics of the zero-temperature spin-boson model, and then exploit the many-body information to visualize the complete time-frequency spectrum of the environmental excitations. Our "environmental spectra" reveal correlated vibrational motion in polaronic modes which preserve their vibrational coherence during incoherent spin relaxation, demonstrating how environment information could yield valuable insights into complex quantum dissipative processes.

引用

页数：10

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