Quantum quench from a thermal initial state

Abstract

We consider a quantum quench in a system of free bosons, starting from a thermal initial state.As in the case where the system is initially in the ground state, any finite subsystem eventually reaches a stationary thermal state with a momentum-dependent effective temperature.We find that this can, in some cases, even be lower than the initial temperature.We also study lattice effects and discuss more general types of quenches.

Locations

• EPL (Europhysics Letters) - View
• arXiv (Cornell University) - View - PDF
• DataCite API - View