Ultracold atoms in one-dimensional optical lattices approaching the Tonks-Girardeau regime

被引：36
作者：
Pollet, L
Rombouts, SMA
Denteneer, PJH
机构：
[1] Univ Ghent, Vakgrp Subatomaire & Stralingsfys, B-9000 Ghent, Belgium
[2] Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.93.210401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Recent experiments on ultracold atomic alkali gases in a one-dimensional optical lattice have demonstrated the transition from a gas of soft-core bosons to a Tonks-Girardeau gas in the hard-core limit, where one-dimensional bosons behave like fermions in many respects. We have studied the underlying many-body physics through numerical simulations which accommodate both the soft-core and hard-core limits in one single framework. We find that the Tonks-Girardeau gas is reached only at the strongest optical lattice potentials. Results for slightly higher densities, where the gas develops a Mott-like phase already at weaker optical lattice potentials, show that these Mott-like short-range correlations do not enhance the convergence to the hard-core limit.
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页数：4
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