1110.3671 (Aditi Mitra et al.)

Thermalization and dissipation in out of equilibrium quantum systems: A
perturbative renormalization group approach    [PDF]

Aditi Mitra, Thierry Giamarchi

A perturbative renormalization group approach is employed to study the effect
of a periodic potential on a system of one-dimensional bosons in a
non-equilibrium steady-state due to an initial interaction quench. The
renormalization group flows are modified significantly from the well known
equilibrium Berezinski-Kosterlitz-Thouless form. They show several new features
such as, a generation of an effective temperature, generation of dissipation,
as well as a change in the location of the quantum critical point separating
the weak coupling and strong coupling phases. Detailed results on the
weak-coupling side of the phase diagram are presented, such as the
renormalization of the parameters and the asymptotic behavior of the
correlation functions. The physical origin of the generated temperature and
friction is discussed.

View original: http://arxiv.org/abs/1110.3671