Quasi-one-dimensional Bose gases with a large scattering length

被引：72

作者：

Astrakharchik, GE ^{[1
]}

Blume, D

Giorgini, S

Granger, BE

机构：

[1] Univ Trent, Dipartimento Fis, I-38050 Povo, Italy

[2] BEC, INFM, I-38050 Povo, Italy

[3] Inst Spect, Troitsk 142190, Moscow Region, Russia

[4] Washington State Univ, Dept Phys, Pullman, WA 99164 USA

[5] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom Mol & Opt Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.030402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bose gases confined in highly elongated harmonic traps are investigated over a wide range of interaction strengths using quantum Monte Carlo techniques. We find that the properties of a Bose gas under tight transverse confinement are well reproduced by a 1D model Hamiltonian with contact interactions. We point out the existence of a unitary regime, where the properties of the quasi-1D Bose gas become independent of the actual value of the 3D scattering length a(3D). In this unitary regime, the energy of the system is well described by a hard-rod equation of state. We investigate the stability of quasi-1D Bose gases with positive and negative a(3D).

引用

页数：4

共 24 条

[1] Quantum Monte Carlo study of the three- to one-dimensional crossover for a trapped Bose gas [J].