Gaussian fidelity distorted by external fields

Autor(es)

Santos, Jonas F. G. ^[1] ; Bernardini, Alex E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Fis, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS; v. 445, p. 75-84, MAR 1 2016.
• Citações Web of Science: 4

Resumo

Gaussian state decoherence aspects due to interacting magnetic-like and gravitational fields are quantified through the quantum fidelity and Shannon entropy in the scope of the phase-space representation of elementary quantum systems. For Gaussian Wigner functions describing harmonic oscillator states, an interacting external field destroys the quantum fidelity and introduces a quantum beating behavior. Likewise, it introduces harmonic profiles for free particle systems. Some aspects of quantum decoherence for the quantum harmonic oscillator and for the free particle limit are also quantified through the Shannon entropy. For the gravitational quantum well, the effect of a magnetic-like field on the quantum fidelity is suppressed by the linear term of the gravitational potential. To conclude, one identifies a fine formal connection of the quantum decoherence aspects discussed here with the noncommutative quantum mechanics. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 15/05903-4 - Emaranhamento de estruturas de bi-espinores no SU(2) x SU(2) e correlações quânticas adicionais exibidas por sistemas tipo-Dirac como grafeno e íons aprisionados
• Beneficiário: Alex Eduardo de Bernardini
• Modalidade de apoio: Auxílio à Pesquisa - Regular