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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Energy rectification in quantum graded spin chains: Analysis of the XXZ model

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Schuab, Lucas ; Pereira, Emmanuel ; Landi, Gabriel T.
Total Authors: 3
Document type: Journal article
Source: Physical Review E; v. 94, n. 4 OCT 19 2016.
Web of Science Citations: 9

In this work, with focus on the energy-transport properties in quantum, low-dimensional, graded materials, we address the investigation of the energy (and spin) current in XXZ open chains with graded inner structures and driven out of equilibrium by magnetization pumping applied at the ends. We study several types of graded structures in different situations in order to show a ubiquitous occurrence of energy rectification, even for the system under a homogeneous magnetic field. Due to technical difficulties, we carry out the computation for small chains, but we present arguments that indicate the extension of some results to larger systems. Recalling the generic existence of energy rectification in classical, graded materials, which are described by anharmonic chains of oscillators, and recalling also the anharmonicity of these XXZ models, which involve quartic terms in more transparent representation in terms of fermionic creation and annihilation operators, we may say that our results extend the ubiquity of energy rectification occurrence in classical graded materials to the case of quantum systems. (AU)

FAPESP's process: 14/01218-2 - Stochastic processes applied to out-of-equilibrium systems
Grantee:Gabriel Teixeira Landi
Support type: Regular Research Grants