2002/06/30 by Ehud Altman, Assa Auerbach · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Mechanics and Applications #Quantum, superfluid, helium dynamics #cond-mat.soft #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.89.250404
published as Phys. Rev. Lett. 89, 250404 (2002) · 4 pages 1 eps figures; Final version as appears in PRL. Added discussion on spontaneous generation of vortices
openalex publication_date 2002/12/03 · arxiv created 2003/04/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.