Universität zu Köln

Huang, Ze-Min, Sun, Xiao-Qi and Diehl, Sebastian (2022). Topological gauge theory for mixed Dirac stationary states in all dimensions. Phys. Rev. B, 106 (24). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

We derive the universal real-time U(1) topological gauge field action for mixed Dirac states of fermions, described by a density matrix weighted by a gapped Dirac operator, in all dimensions. The key prerequisites are charge quantization and charge conservation; in fact, charge quantization is the root of the action's topological properties. The gauge action encodes nonquantized linear responses as expected for mixed states, but also quan-tized nonlinear responses, which are accessible in experiment. Our construction furthermore demonstrates how the physical pictures of anomaly inflow and bulk-boundary correspondence extend to nonequilibrium systems. Finally, we demonstrate the independence of the gauge action of the underlying equilibrium or nonequilibrium nature of dynamics stabilizing the state.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Huang, Ze-Min UNSPECIFIED UNSPECIFIED UNSPECIFIED Sun, Xiao-Qi UNSPECIFIED UNSPECIFIED UNSPECIFIED Diehl, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-669848
DOI:	10.1103/PhysRevB.106.245204
Journal or Publication Title:	Phys. Rev. B
Volume:	106
Number:	24
Date:	2022
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FINITE-TEMPERATURE; QUANTUM; DISSIPATION; ANOMALIES Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66984