Condensed Matter Theory

Andre Eckardt AC-induced superfluidity

Author(s): Andre Eckardt, Martin Holthaus

AC-induced superfluidity

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Article: EPL 80, 50004 (2007), Europhysics Letters


PACS: 03.75.Lm, 03.75.Kk

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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