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Abstract:

The master equation for a linear open quantum system in a general environment is derived using a stochastic approach. This is an alternative derivation to that of Hu, Paz, and Zhang, which was based on the direct computation of path integrals, or to that of Halliwell and Yu, based on the evolution of the Wigner function for a linear closed quantum system. We first show by using the influence functional formalism that the reduced Wigner function for the open system coincides with a distribution function resulting from averaging both over the initial conditions and the stochastic source of a formal Langevin equation. The master equation for the reduced Wigner function can then be deduced as a Fokker-Planck equation obtained from the formal Langevin equation. © 2001 Plenum Publishing Corporation.

Registro:

Documento: Artículo
Título:Master equation for quantum brownian motion derived by stochastic methods
Autor:Calzetta, E.; Roura, A.; Verdaguer, E.
Filiación:Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
Departament de Física Fonamental, Universitat de Barcelona, Barcelona, Spain
Institut de Física d'Altes Energies (IFAE), Barcelona, Spain
Department de Física Fonamental, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain
Año:2001
Volumen:40
Número:12
Página de inicio:2317
Página de fin:2332
DOI: http://dx.doi.org/10.1023/A:1012946523088
Título revista:International Journal of Theoretical Physics
Título revista abreviado:Int. J. Theor. Phys.
ISSN:00207748
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v40_n12_p2317_Calzetta

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Citas:

---------- APA ----------
Calzetta, E., Roura, A. & Verdaguer, E. (2001) . Master equation for quantum brownian motion derived by stochastic methods. International Journal of Theoretical Physics, 40(12), 2317-2332.
http://dx.doi.org/10.1023/A:1012946523088
---------- CHICAGO ----------
Calzetta, E., Roura, A., Verdaguer, E. "Master equation for quantum brownian motion derived by stochastic methods" . International Journal of Theoretical Physics 40, no. 12 (2001) : 2317-2332.
http://dx.doi.org/10.1023/A:1012946523088
---------- MLA ----------
Calzetta, E., Roura, A., Verdaguer, E. "Master equation for quantum brownian motion derived by stochastic methods" . International Journal of Theoretical Physics, vol. 40, no. 12, 2001, pp. 2317-2332.
http://dx.doi.org/10.1023/A:1012946523088
---------- VANCOUVER ----------
Calzetta, E., Roura, A., Verdaguer, E. Master equation for quantum brownian motion derived by stochastic methods. Int. J. Theor. Phys. 2001;40(12):2317-2332.
http://dx.doi.org/10.1023/A:1012946523088