Rectification induced by geometry in two-dimensional quantum spin lattices.

Chioquetta, Alessandra; Pereira, Emmanuel; Landi, Gabriel T; Drumond, Raphael C

Chioquetta, Alessandra; Pereira, Emmanuel; Landi, Gabriel T; Drumond, Raphael C.

Afiliação

Chioquetta A; Departamento de Física - Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, CP 702, 30.161-970 Belo Horizonte MG, Brazil.
Landi GT; Instituto de Física da Universidade de São Paulo, 05314-970 São Paulo, Brazil.
Drumond RC; Departamento de Matemática, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.

Phys Rev E ; 103(3-1): 032108, 2021 Mar.

Article em En | MEDLINE | ID: mdl-33862738

RESUMO

We address the role of geometrical asymmetry in the occurrence of spin rectification in two-dimensional quantum spin chains subject to two reservoirs at the boundaries, modeled by quantum master equations. We discuss the differences in the rectification for some one-dimensional cases, and present numerical results of the rectification coefficient R for different values of the anisotropy parameter of the XXZ model, and different configurations of boundary drives, including both local and nonlocal dissipators. Our results also show that geometrical asymmetry, along with inhomogeneous magnetic fields, can induce spin current rectification even in the XX model, indicating that the phenomenon of rectification due to geometry may be of general occurrence in quantum spin systems.

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev E Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

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