4.6 Article

Nonlinear waves of Bose-Einstein condensates in rotating ring-lattice potentials

Journal

PHYSICAL REVIEW A
Volume 99, Issue 2, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.99.023630

Keywords

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Funding

  1. Ministerio de Economia y Competitividad (Spain)
  2. Fondo Europeo de Desarrollo Regional (FEDER, EU) [FIS2014-52285-C2-1-P, FIS2017-87801-P, FIS2013-41532-P, FIS2016-79596-P]
  3. Marsden Fund of New Zealand [MAU1604]

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We analyze the dynamics of Bose-Einstein condensates loaded in rotating ring lattices made of a few sites, and show how rotation maps the states found in this finite system onto those belonging to a static infinite lattice. Ring currents and soliton states in the absence of a lattice find their continuation in the presence of the lattice as nonlinear Bloch waves and soliton-like states connecting them. Both bright gap solitons and dark-soliton trains are shown to connect continuously to linear solutions. The existence of adiabatic paths upon varying rotation frequency between states with quantized supercurrents suggests highly controllable methods for the experimental generation of persistent currents.

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