Absence of Landau damping in driven three-component Bose-Einstein condensate in optical lattices
Quantum Gases
2018-08-28 v2
Abstract
We explore the quantum many-body physics of a three-component Bose-Einstein condensate (BEC) in an optical lattices driven by laser fields in and configurations. We obtain exact analytical expressions for the energy spectrum and amplitudes of elementary excitations, and discover symmetries among them. We demonstrate that the applied laser fields induce a gap in the otherwise gapless Bogoliubov spectrum. We find that Landau damping of the collective modes above the energy of the gap is carried by laser-induced roton modes and is considerably suppressed compared to the phonon-mediated damping endemic to undriven scalar BECs.
Keywords
Cite
@article{arxiv.1705.10199,
title = {Absence of Landau damping in driven three-component Bose-Einstein condensate in optical lattices},
author = {Gavriil Shchedrin and Daniel Jaschke and Lincoln D. Carr},
journal= {arXiv preprint arXiv:1705.10199},
year = {2018}
}