Quantum criticality in the nonunitary dynamics of (2+1)-dimensional free fermions

2021/01/31 by Qicheng Tang, Xiao Chen, Xiao Dong Chen +1
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Criticality #Mathematical physics #Nuclear physics #Opinion Dynamics and Social Influence #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Statistical physics #cond-mat.dis-nn #cond-mat.stat-mech #quant-ph

paper · pdf · doi:10.1103/physrevb.103.174303

published as Phys. Rev. B 103, 174303 (2021) · 6 pages and 6 figures (main text) + 19 pages and 18 figures (appendices)

arxiv created 2021/05/12 · openalex publication_date 2021/05/12 · arxiv updated 2021/05/13 · openalex created_date 2021/05/24 · openalex updated_date 2026/08/05

Abstract

Quantum criticality, which exhibits universal features such as nontrivial collective fluctuations, is one of the central topics in statistical and condensed matter physics. Here, the authors design a class of nonunitary random dynamics of free fermions that robustly produces novel critical steady states. The emergent quantum criticality is numerically confirmed for the 2+1 dimensional case, and the proposed analytical interpretation can be easily extended to any dimensions. Their discoveries are potentially helpful to understand quantum critical phenomenon in nonequilibrium dynamics.

Citations

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