Finite temperature mobility of a particle coupled to a fermion environment

Details Finite temperature mobility of a particle coupled to a fermion environment Finite temperature mobility of a particle coupled to a fermion environment

1996-03-12

arxiv.org/abs/cond-mat/9603088v1

Phys. Rev. B, 54 (1996) p. 4375

Physics

Condensed Matter

11 pages (RevTeX), 5 Postscript files, compressed using uufiles

Scientific paper

10.1103/PhysRevB.54.4375

We study numerically the finite temperature and frequency mobility of a particle coupled by a local interaction to a system of spinless fermions in one dimension. We find that when the model is integrable (particle mass equal to the mass of fermions) the static mobility diverges. Further, an enhanced mobility is observed over a finite parameter range away from the integrable point. We present a novel analysis of the finite temperature static mobility based on a random matrix theory description of the many-body Hamiltonian.

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