Two-step condensation of lattice bosons
arXiv:0912.0099 · doi:10.1016/j.physa.2010.09.015
Abstract
We present a theoretical study of Bose-Einstein condensation in highly anisotropic harmonic traps. The bosons are considered to be moving in an optical lattice in an overall anisotropic harmonic confining potential. We find that two-step condensation occurs for lattice bosons at much reduced harmonic potential anisotropy when compared to the case of an ideal bose gas in an anisotropic harmonic confinement. We also show that when the bosons are in an isotropic harmonic confinement but with highly anisotropic hopping in the optical lattice, two-step condensation does not occur. We interpret some of our results using single boson density of energy states corresponding to the potentials faced by the bosons.
10 pages including figures, revised version
References in corpus (14)
- Many-Body Physics with Ultracold Gases
- Theory of Bose-Einstein condensation in trapped gases
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Cold Bosons in Optical Lattices
- Excitations of a Superfluid in a 3D Optical Lattice
- Single-atom density of states of an optical lattice
- Bose-Einstein condensation in an optical lattice
- Finite temperature theory of superfluid bosons in optical lattices
- Signal of Bose condensation in an optical lattice at finite temperature
- Critical temperature of a Bose gas in an optical lattice
- Studies of bosons in optical lattices in a harmonic potential
- Finite temperature coherence of the ideal Bose gas in an optical lattice
- Lattice bosons in quartic confinement
- On Multistep Bose-Einstein Condensation in Anisotropic Traps