Nonequilibrium free energy and information flow of a double quantum-dot system with Coulomb coupling

• 作者: Zhiyuan Lin Tong Fu Juying Xiao Shanhe Su Jincan Chen Yanchao Zhang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: GENERAL
• 页码范围: 260-269
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-1056/abe119

摘要

We build a double quantum-dot system with Coulomb coupling and aim at studying connections among the entropy production,free energy,and information flow.By utilizing concepts in stochastic thermodynamics and graph theory anal-ysis,Clausius and nonequilibrium free energy inequalities are built to interpret local second law of thermodynamics for subsystems.A fundamental set of cycle fluxes and affinities is identified to decompose two inequalities by using Schnaken-berg's network theory.Results show that the thermodynamic irreversibility has energy-related and information-related contributions.A global cycle associated with the feedback-induced information flow would pump electrons against the bias voltage,which implements a Maxwell demon.