Two-component fermi gas on internal-state-dependent optical lattices

被引:62
作者
Cazalilla, MA
Ho, AF
Giamarchi, T
机构
[1] DIPC, Donostia San Sebastian 20018, Spain
[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[3] Univ Geneva, CH-1211 Geneva, Switzerland
关键词
D O I
10.1103/PhysRevLett.95.226402
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the phase diagram of a one-dimensional, two-component (i.e., pseudo-"spin"-1/2) ultracold atomic Fermi gas. The two atom species can have different hopping or mass. A very rich phase diagram for equal densities of the species is found, containing Mott insulators and superfluids. We also discuss coupling such 1D systems and the experimental signatures of the phases. In particular, we compute the spin-structure factor at small momentum, which should reveal a spin gap.
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页数:4
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共 39 条
[1]   Mechanism of high-temperature superconductivity in a striped Hubbard model [J].
Arrigoni, E ;
Fradkin, E ;
Kivelson, SA .
PHYSICAL REVIEW B, 2004, 69 (21) :214519-1
[2]   Trapping fermionic 40K and bosonic 87Rb on a chip [J].
Aubin, S ;
Extavour, MHT ;
Myrskog, S ;
LeBlanc, LJ ;
Estève, J ;
Singh, S ;
Scrutton, P ;
McKay, D ;
McKenzie, R ;
Leroux, ID ;
Stummer, A ;
Thywissen, JH .
JOURNAL OF LOW TEMPERATURE PHYSICS, 2005, 140 (5-6) :377-396
[3]   Electronic ferroelectricity in the Falicov-Kimball model [J].
Batista, CD .
PHYSICAL REVIEW LETTERS, 2002, 89 (16) :1-166403
[4]   Spectroscopy of superfluid pairing in atomic fermi gases -: art. no. 080401 [J].
Büchler, HP ;
Zoller, P ;
Zwerger, W .
PHYSICAL REVIEW LETTERS, 2004, 93 (08) :080401-1
[5]   Instabilities in binary mixtures of one-dimensional quantum degenerate gases [J].
Cazalilla, MA ;
Ho, AF .
PHYSICAL REVIEW LETTERS, 2003, 91 (15) :150403-150403
[6]  
CAZALILLA MA, IN PRESS
[7]   Crossover temperature of Bose-Einstein condensation in an atomic Fermi gas [J].
Falco, GM ;
Stoof, HTC .
PHYSICAL REVIEW LETTERS, 2004, 92 (13) :130401-1
[8]   ASYMMETRIC HUBBARD CHAIN AT HALF-FILLING [J].
FATH, G ;
DOMANSKI, Z ;
LEMANSKI, R .
PHYSICAL REVIEW B, 1995, 52 (19) :13910-13915
[9]   Phase separation due to quantum mechanical correlations [J].
Freericks, JK ;
Lieb, EH ;
Ueltschi, D .
PHYSICAL REVIEW LETTERS, 2002, 88 (10) :4-106401
[10]   Exactly solvable model of the BCS-BEC crossover [J].
Fuchs, JN ;
Recati, A ;
Zwerger, W .
PHYSICAL REVIEW LETTERS, 2004, 93 (09) :090408-1