Data di Pubblicazione:
2007
Citazione:
Relaxation dynamics of a quantum Brownian particle in an ideal gas / K. Hornberger, B. Vacchini. - In: THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS. - ISSN 1951-6355. - 151:1(2007), pp. 59-72.
Abstract:
We show how the quantum analog of the Fokker-Planck equation for describing Brownian motion can be obtained as the diffusive limit of the quantum linear Boltzmann equation. The latter describes the quantum dynamics of a tracer particle in a dilute, ideal gas by means of a translation-covariant master equation. We discuss the type of approximations required to obtain the generalized form of the Caldeira-Leggett master equation, along with their physical justification. Microscopic expressions for the diffusion and relaxation coefficients are obtained by analyzing the limiting form of the equation in both the Schroedinger and the Heisenberg picture.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
K. Hornberger, B. Vacchini
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