Abstract
Following a suggestion by Orzel et al. [Science 291, 2386 (2001)]], we analyze bosons in an optical lattice undergoing a sudden parameter change from the Mott to superfluid phase. We introduce a modified coherent states path integral to describe both phases. The saddle point theory yields collective oscillations of the uniform superfluid order parameter. We calculate its damping rate by phason pair emission. In two dimensions the overdamped region largely overlaps with the quantum critical region. Measurements of critical dynamics on the Mott side are proposed.
Keywords
SuperfluidityBosonPhysicsCondensed matter physicsQuantum mechanicsParticle physics
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Publication Info
- Year
- 2002
- Type
- article
- Volume
- 89
- Issue
- 25
- Pages
- 250404-250404
- Citations
- 217
- Access
- Closed
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Cite This
Ehud Altman,
Assa Auerbach
(2002).
Oscillating Superfluidity of Bosons in Optical Lattices.
Physical Review Letters
, 89
(25)
, 250404-250404.
https://doi.org/10.1103/physrevlett.89.250404
Identifiers
- DOI
- 10.1103/physrevlett.89.250404