VORTICES IN MULTICOMPONENT BOSE–EINSTEIN CONDENSATES

By K. Kasamatsu, M. Tsubota, Masahito Ueda. 2005

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We review the topic of quantized vortices in multicomponent Bose–Einstein condensates of dilute atomic gases, with an emphasis on the two-component condensates. First, we review the fundamental structure, stability and dynamics of a single vortex state in a slowly rotating two-component condensates. To understand recent experimental results, we use the coupled Gross–Pitaevskii equations and the generalized nonlinear sigma model. An axisymmetric vortex state, which was observed by the JILA group, can be regarded as a topologically trivial skyrmion in the pseudospin representation. The internal, coherent coupling between the two components breaks the axisymmetry of the vortex state, resulting in a stable vortex molecule (a meron pair). We also mention unconventional vortex states and monopole excitations in a spin-1 Bose–Einstein condensate. Next, we discuss a rich variety of vortex states realized in rapidly rotating two-component Bose–Einstein condensates. We introduce a phase diagram with axes of rotatio...

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/0550c8002a0d223bdc05a98802bcf75311c0aa89

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Spinor Bose gases: Symmetries, magnetism, and quantum dynamics (2013, background): “Aspects of topological defects, particularly of vortices, in spinor condensates are discussed in Kasamatsu et al. (2005).”
Spinor Bose-Einstein condensates (2010, background): “hosen loop from the homotopy class [ℓi] because all loops belonging to the same class are equivalent and continuously deformable to each other. Mathematically, a loop ℓis deﬁned as a mapping from I = [0,1] to a topological space such that ℓ(0) = ℓ(1) = x0, where x0 is called a base point. If two loo”