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Exotic vortex lattices in two-species Bose-Einstein condensates

2012; American Physical Society; Volume: 85; Issue: 4 Linguagem: Inglês

10.1103/physreva.85.043613

1538-4446

Pekko Kuopanportti, Jukka Huhtamäki, Mikko Möttönen,

Quantum, superfluid, helium dynamics

We numerically investigate vortex lattices in rotating two-component Bose-Einstein condensates in which the two components have unequal atomic masses and interact attractively with each other. For sufficiently strong attraction, the system is found to exhibit exotic ground-state structures in a harmonic trap, such as lattices having a square geometry or consisting of two-quantum vortices. The obtained states satisfy the Feynman relation, and they can be realized with current experimental techniques.