Transport coefficients in non-quasiparticle systems

Details Transport coefficients in non-quasiparticle systems Transport coefficients in non-quasiparticle systems

2011-01-11

arxiv.org/abs/1101.2095v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, uses svjour; talk presented in HCBM 2010, International Workshop on Hot & Cold Baryonic Matter 15-20 August 2010, Bud

Scientific paper

Transport coefficeints, in particular the shear viscosity to entropy density
ratio is studied in systems where the small-width quasiparticle assumption is
not valid. It is found that $\eta/s$ has no unversal lower bound, the minimal
value depends on the system and the temperature, and can be even zero. We
construct models where the $1/4\pi$ conjectured bound is violated.

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