Phys. Rev. Lett. 93, 130404 (2004) [4 pages]Relaxation and Dephasing in a Many-Fermion Generalization of the Caldeira-Leggett ModelReceived 18 May 2003; published 22 September 2004 We analyze a model system of fermions in a harmonic oscillator potential under the influence of a fluctuating force generated by a bath of harmonic oscillators. This represents an extension of the well-known Caldeira-Leggett model to the case of many fermions. Using the method of bosonization, we calculate Green’s functions and discuss relaxation and dephasing of a single extra particle added above the Fermi sea. We also extend our analysis to a more generic coupling between system and bath that results in complete thermalization of the system. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.130404
DOI:
10.1103/PhysRevLett.93.130404
PACS:
03.65.Yz, 05.30.Fk, 71.10.Pm
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