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Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
Mode-coupling-induced dissipative and thermal effects at long times after a quantum quench
Aditi Mitra1, Thierry Giamarchi
1Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA.
Abstract:
An interaction quench in a Luttinger liquid can drive it into an athermal steady state. We analyze the effects on such an out of equilibrium state of a mode coupling term due to a periodic potential. Employing a perturbative renormalization group approach we show that even when the periodic potential is an irrelevant perturbation in equilibrium, it has important consequences on the athermal steady state as it generates a temperature as well as a dissipation and hence a finite lifetime for the bosonic modes.
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