Universal short-time response and formation of correlations after quantum quenches

Abstract

The short-time evolution of two distinct systems, the pump and probe experiments with semiconductor and the sudden quench of cold atoms in an optical lattice, is found to be described by the same universal response function. This analytic formula at short time scales is derived from the quantum kinetic theory approach observing that correlations need time to be formed. The demand of density conservation leads to a reduction of the relaxation time by a factor of four in quench setups. The influence of finite trapping potential is derived and discussed as well as Singwi-Sjølander local field corrections.

submitted 14 April 2014

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Cited by in corpus (4)

• Hydrodynamics of local excitations after an interaction quench in 1D cold atomic gases
• Effect of light-assisted tunable interaction on the position response function of cold atoms
• Non-resonant inter-species interaction and its effect on the position response function of cold atoms
• Quantum currents and pair correlation of electrons in a chain of localized dots