Work

Information constraint in open quantum systems

Year: 2021

Type: article

Abstract: We propose an effect called information constraint which is characterized by the existence of different decay rates of signal strengths propagating along opposite directions. It is an intrinsic property of a type of open quantum systems, which does not rely on boundary conditions. We define the value of information constraint $({I}_{C})$ as the ratio of different decay rates and derive the analytical representation of ${I}_{C}$ for general quadratic Lindbladian systems. Based on information constraint, we can provide a simple and elegant explanation of chiral and helical damping, and get the local maximum points of relative particle number for the periodical boundary system, consistent with numerical calculations. Inspired by information constraint, we propose and prove the correspondence between edge modes and damping modes. A new damping mode called Dirac damping is constructed, and chiral/helical damping can be regarded as a special case of Dirac damping.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.104.174305

Authors: Chun-Hui Liu, Shu Chen

Institutions: Chinese Academy of Sciences, Institute of Physics, University of Chinese Academy of Sciences, Yangtze River Delta Physics Research Center (China)

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Chinese Academy of Sciences

Awards: G4352696510, G4953843186