Vortices in spin-orbit-coupled Bose-Einstein condensates

J. Radić, T. A. Sedrakyan, I. B. Spielman, V. Galitski

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

Realistic methods to create vortices in spin-orbit-coupled Bose-Einstein condensates are discussed. It is shown that, contrary to common intuition, rotation of the trap containing a spin-orbit condensate does not lead to an equilibrium state with static vortex structures but gives rise instead to nonequilibrium behavior described by an intrinsically time-dependent Hamiltonian. We propose here the following alternative methods to induce thermodynamically stable static vortex configurations: (i) to rotate both the lasers and the anisotropic trap and (ii) to impose a synthetic Abelian field on top of synthetic spin-orbit interactions. Effective Hamiltonians for spin-orbit condensates under such perturbations are derived for most currently known realistic laser schemes that induce synthetic spin-orbit couplings. The Gross-Pitaevskii equation is solved for several experimentally relevant regimes. The new interesting effects include spatial separation of left- and right-moving spin-orbit condensates, the appearance of unusual vortex arrangements, and parity effects in vortex nucleation where the topological excitations are predicted to appear in pairs. All these phenomena are shown to be highly nonuniversal and depend strongly on a specific laser scheme and system parameters.

Original languageEnglish (US)
Article number063604
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number6
DOIs
StatePublished - Dec 5 2011
Externally publishedYes

Fingerprint

Dive into the research topics of 'Vortices in spin-orbit-coupled Bose-Einstein condensates'. Together they form a unique fingerprint.

Cite this