Metastable Superfluidity of Repulsive Fermionic Atoms in Optical Lattices

被引：108

作者：

Rosch, Achim ^{[1
]}

Rasch, David ^{[1
]}

Binz, Benedikt ^{[1
]}

Vojta, Matthias ^{[1
]}

机构：

[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.101.265301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the fermionic Hubbard model, doubly occupied states have an exponentially large lifetime for strong repulsive interactions U. We show that this property can be used to prepare a metastable s-wave superfluid state for fermionic atoms in optical lattices described by a large-U Hubbard model. When an initial band-insulating state is expanded, the doubly occupied sites Bose condense. A mapping to the ferromagnetic Heisenberg model in an external field allows for a reliable solution of the problem. Nearest-neighbor repulsion and pair hopping are important in stabilizing superfluidity.

引用

页数：4

共 14 条

[1] KINETIC EXCHANGE INTERACTION IN A NARROW S-BAND [J].

CHAO, KA ;

SPALEK, J ;

OLES, AM .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1977, 10 (10) :L271-L276

[2] Collapse and revival of the matter wave field of a Bose-Einstein condensate [J].

Greiner, M ;

Mandel, O ;

Hänsch, TW ;

Bloch, I .

NATURE, 2002, 419 (6902) :51-54

[3] Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms [J].

Greiner, M ;

Mandel, O ;

Esslinger, T ;

Hänsch, TW ;

Bloch, I .

NATURE, 2002, 415 (6867) :39-44

[4] Mott transition of fermionic atoms in a three-dimensional optical trap [J].

Helmes, R. W. ;

Costi, T. A. ;

Rosch, A. .

PHYSICAL REVIEW LETTERS, 2008, 100 (05)

[5] A Mott insulator of fermionic atoms in an optical lattice [J].

Joerdens, Robert ;

Strohmaier, Niels ;

Guenther, Kenneth ;

Moritz, Henning ;

Esslinger, Tilman .

NATURE, 2008, 455 (7210) :204-U34

[6] Quench dynamics and nonequilibrium phase diagram of the Bose-Hubbard model [J].

Kollath, Corinna ;

Laeuchli, Andreas M. ;

Altman, Ehud .

PHYSICAL REVIEW LETTERS, 2007, 98 (18)

[7] T/U EXPANSION FOR THE HUBBARD-MODEL [J].

MACDONALD, AH ;

GIRVIN, SM ;

YOSHIOKA, D .

PHYSICAL REVIEW B, 1988, 37 (16) :9753-9756

[8] Quantum liquid of repulsively bound pairs of particles in a lattice [J].

Petrosyan, David ;

Schmidt, Bernd ;

Anglin, James R. ;

Fleischhauer, Michael .

PHYSICAL REVIEW A, 2007, 76 (03)

[9] Observation of resonance condensation of fermionic atom pairs [J].

Regal, CA ;

Greiner, M ;

Jin, DS .

PHYSICAL REVIEW LETTERS, 2004, 92 (04) :4

[10] Metallic and Insulating Phases of Repulsively Interacting Fermions in a 3D Optical Lattice [J].

Schneider, U. ;

Hackermueller, L. ;

Will, S. ;

Best, Th. ;

Bloch, I. ;

Costi, T. A. ;

Helmes, R. W. ;

Rasch, D. ;

Rosch, A. .

SCIENCE, 2008, 322 (5907) :1520-1525

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