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Transport in boundary-driven quantum spin systems: one-way street for the energy current

Oliveira, Deborah ; Pereira, Emmanuel ; Lemos, Humberto C F

Journal of physics. A, Mathematical and theoretical, 2020-09, Vol.53 (37), p.375007 [Periódico revisado por pares]

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Título:
Transport in boundary-driven quantum spin systems: one-way street for the energy current
Autor: Oliveira, Deborah ; Pereira, Emmanuel ; Lemos, Humberto C F
Assuntos: boundary-driven quantum systems ; energy tranport ; symmetries in the Lindblad equation
É parte de: Journal of physics. A, Mathematical and theoretical, 2020-09, Vol.53 (37), p.375007
Notas: JPhysA-113482.R1
Descrição: We study transport properties in boundary-driven asymmetric quantum spin chains given by XXZ and XXX Heisenberg models. Our approach exploits symmetry transformations in the Lindblad master equation associated to the dynamics of the systems. We describe the mathematical steps to build the unitary transformations related to the symmetry properties. For general target polarizations, we show the occurrence of the one-way street phenomenon for the energy current, namely, the energy current does not change in magnitude and direction as we invert the baths at the boundaries. We also analyze the spin current in some situations, and we prove the uniqueness of the steady state for all investigated cases. Our results, involving nontrivial properties of the energy flow, shall interest researchers working on the control and manipulation of quantum transport.
Editor: IOP Publishing
Idioma: Inglês

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