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Classical Langevin equations for the free electron gas and blackbody radiation

T D Frank

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Among others, Uhling and Uhlenbeck, Kaniadakis and Quarati and Kadanoff have suggested to describe the evolution of quantum systems exhibiting Fermi–Dirac and Bose–Einstein statistics by means of classical but nonlinear evolution equations for density measures such as generalized Boltzmann equations and nonlinear Fokker–Planck equations. We use this approach in order to derive classical Langevin equations for quantum systems and apply the Langevin equations thus obtained to two fundamental quantum systems, namely, the free electron gas and blackbody radiation.


PACS

05.30.Fk Fermion systems and electron gas

05.10.Gg Stochastic analysis methods (Fokker-Planck, Langevin, etc.)

05.30.Jp Boson systems

44.40.+a Thermal radiation

05.60.Cd Classical transport

MSC

78A40 Waves and radiation

82C31 Stochastic methods (Fokker-Planck, Langevin, etc.) (See also 60H10)

Subjects

Quantum gases, liquids and solids

Computational physics

Statistical physics and nonlinear systems

Dates

Issue 11 (19 March 2004)

Received 30 January 2004

Published 2 March 2004



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