Interaction quenches in the two-dimensional fermionic Hubbard model
Strongly Correlated Electrons
2014-03-14 v2 Quantum Physics
Abstract
The generic non-equilibrium evolution of a strongly interacting fermionic system is studied. For strong quenches, a collective collapse-and-revival phenomenon is found extending over the whole Brillouin zone. A qualitatively distinct behavior occurs for weak quenches where only weak wiggling occurs. Surprisingly, no evidence for prethermalization is found in the weak coupling regime. In both regimes, indications for relaxation beyond oscillatory or power law behavior are found and used to estimate relaxation rates without resorting to a probabilistic ansatz. The relaxation appears to be fastest for intermediate values of the quenched interaction.
Cite
@article{arxiv.1307.3438,
title = {Interaction quenches in the two-dimensional fermionic Hubbard model},
author = {Simone A. Hamerla and Götz S. Uhrig},
journal= {arXiv preprint arXiv:1307.3438},
year = {2014}
}