Condensed Matter Theory

Dave Boers et.al.: Bogoliubov speed of sound for a dilute Bose-Einstein condensate in a 3d optical lattice

Author(s): Dave Boers, Christoph Weiss, Martin Holthaus

Title:
Bogoliubov speed of sound for a dilute Bose-Einstein condensate in a 3d optical lattice

Date of Upload:
2004-08-02

Article: Europhys. Lett. 67, 887 (2004), European Physical Society

Keywords:

Abstract:
We point out that the velocity of propagation of sound wavepackets in a Bose-Einstein condensate filling a three-dimensional cubic optical lattice undergoes a maximum with increasing lattice depth. For a realistic choice of parameters, the maximum sound velocity in a lattice condensate can exceed the sound velocity in a homogeneous condensate with the same average density by 30%. The maximum falls into the superfluid regime, and should be observable under currently achievable laboratory conditions.

URL: http://arxiv.org/abs/cond-mat/0407617 (text/plain)


This shadow-file was created by My Meta Maker 1.6.1. Last Update: Fri Sep 10 12:24:21 2004