AC-induced superfluidity

Details AC-induced superfluidity AC-induced superfluidity

2007-09-05

arxiv.org/abs/0709.0605v2

EPL 80, 550004 (2007)

Physics

Condensed Matter

Other Condensed Matter

Accepted for publication in Europhysics letters, 6 pages, 4 figures, Changes in v2: reference 7 replaced by a more recent one

Scientific paper

10.1209/0295-5075/80/50004

We argue that a system of ultracold bosonic atoms in a tilted optical lattice can become superfluid in response to resonant AC forcing. Among others, this allows one to prepare a Bose-Einstein condensate in a state associated with a negative effective mass. Our reasoning is backed by both exact numerical simulations for systems consisting of few particles, and by a theoretical approach based on Floquet-Fock states.

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