Absence of Landau damping in driven three-component Bose–Einstein condensate in optical lattices
Abstract
We explore the quantum many-body physics of a three-component Bose-Einstein condensate in an optical lattice driven by laser fields in V and Λ 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 condensates
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 01, 2018
- Source ID
- 10.1038/s41598-018-29454-y
Entities
People
- Daniel Jaschke
- Gavriil Shchedrin
- Lincoln D Carr
Organizations
- Division of Physics
- United States Air Force