Topological Condensate in an Interaction Induced Gauge Potential
arXiv:1411.5868 · doi:10.1103/PhysRevA.92.013604
Abstract
We systematically investigate the ground state and elementary excitations of a Bose-Einstein Condensate with a synthetic vector potential, which is induced by the many-body effects and atom-light coupling. For a sufficiently strong inter-atom interaction, we find the condensate undergoes a Stoner-type ferromagnetic transition through the self-consistent coupling with the vector potential. For a weak interaction, the critical velocity of a supercurrent is found anisotropic due to the density fluctuations affecting the gauge field. We further analytically demonstrate the topological ground state with a coreless vortex ring in a 3D harmonic trap and a coreless vortex-antivortex pair in a 2D trap. The circulating persistent current is measurable in the time-of-flight experiment or in the dipolar oscillation through the violation of Kohn theorem.
arXiv comment5+3 pages of RevTex4-1, 4+1 figures
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- Synthetic Flux Attachment
- Vortex patterns of atomic Bose-Einstein condensates in a density-dependent gauge potential
- Vortex dynamics in superfluids governed by an interacting gauge theory
- Quantized vortices in interacting gauge theories
- Trapped Bose-Einstein condensates in the presence of a current nonlinearity
- Chaotic dynamics of Bose-Einstein condensate in a density-dependent gauge field
- Few-to-many vortex states of density-angular-momentum coupled Bose-Einstein condensates
- Excitation spectrum of vortex-lattice modes in a rotating condensate with a density-dependent gauge potential