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Quantum dissipation of arbitrary strength from coupling to fermions
Journal of Physics A: Mathematical and General
A single degree of freedom, analogous to the coordinate of a particle, is coupled to the density fluctuations of a filled sea of fermions. The fermions live in one spatial dimension and have a linear energy-momentum relation, as may be appropriate in the vicinity of the Fermi surface. By using the equivalence of fermions and bosons in one space dimension, we show that the classical limit of the above theory leads to a Langevin equation for the coordinate of the 'particle' in which there are nodoi:10.1088/0305-4470/23/7/019 fatcat:glqr3yngkjghxasxgdukaa3flq