Two-Time Correlation Functions in Dissipative and Interacting Bose–Hubbard Chains

Condensed Matter

Denis, Zakari¹ 

关键词: open quantum systems;    Bose–Einstein condensates;    ultracold atoms;    correlation functions;    Green functions;   

DOI  :  10.3390/condmat3010002

学科分类：凝聚态物理

来源: mdpi

【 摘 要 】

A method is presented for the systematic derivation of a hierarchy of coupled equations for the computation of two-time correlation functions of operators for open many-body quantum systems. We show how these systems of equations can be closed in mean-field and beyond approximations. Results for the specific example of the spectral weight functions are discussed. Our method allows one to access the full temporal evolution, not just the stationary solution, of non-equilibrium open quantum problems described by a Markovian master equation.

【 授权许可】

CC BY