Master equation for a quantum particle in a gas |
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Authors: | Hornberger Klaus |
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Affiliation: | Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universit?t München, Theresienstrasse 37, 80333 Munich, Germany. www.klaus-hornberger.de |
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Abstract: | The equation for the quantum motion of a Brownian particle in a gaseous environment is derived by means of S-matrix theory. This quantum version of the linear Boltzmann equation accounts nonperturbatively for the quantum effects of the scattering dynamics and describes decoherence and dissipation in a unified framework. As a completely positive master equation it incorporates both the known equation for an infinitely massive Brownian particle and the classical linear Boltzmann equation as limiting cases. |
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