Interference pattern of Bose-condensed gas in a 2D optical lattice
Shujuan Liu, Hongwei Xiong, Zhijun Xu, Guoxiang Huang
TL;DR
This paper investigates the evolution of interference patterns in a Bose-condensed gas confined in a 2D optical lattice, using the Gross-Pitaevskii equation and propagator method to analyze experimental scenarios.
Contribution
It provides an analytical description of the motion of interference pattern side peaks after switching off optical lattice and magnetic trap.
Findings
Analytical description of side peak motion in interference patterns
Time evolution of interference patterns after switching off potentials
Consideration of non-uniform atom distribution in lattice sites
Abstract
For the Bose-condensed gas confined in a magnetic trap and in a two-dimensional optical lattice, the non-uniform distribution of atoms in different lattice sites is considered based on Gross-Pitaevskii equation. A propagator method is used to investigate the time evolution of 2D interference patterns after (i)only the optical lattice is swithed off, and (ii)both the optical lattice and the magnetic trap are swithed off. An analytical description on the motion of side peaks in the interference patterns is presented by using the density distribution in a momentum space.
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