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Quantum Friction |
| Roumen Tsekov** |
Department of Physical Chemistry, University of Sofia, 1164 Sofia, Bulgaria
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Roumen Tsekov 2012 Chin. Phys. Lett. 29 120504 |
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Abstract The Brownian motion of a light quantum particle in a heavy classical gas is theoretically described and a new expression for the friction coefficient is obtained for arbitrary temperature. At zero temperature it equals the de Broglie momentum of the mean free path divided by the mean free path. Alternatively, the corresponding mobility of the quantum particle in the classical gas is equal to the square of the mean free path divided by the Planck constant. The Brownian motion of a quantum particle in a quantum environment is also discussed.
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Received: 10 July 2012
Published: 04 March 2013
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| PACS: |
05.40.-a
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(Fluctuation phenomena, random processes, noise, and Brownian motion)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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