Variational Monte Carlo analysis of singlet-pairing state in a system with inhomogeneous potential

被引：1

作者：

Fujihara, Yusuke ^{[1
]}

Koga, Akihisa ^{[1
]}

Kawakami, Norio ^{[1
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 12期

关键词：

Superconductivity;

D O I：

10.1016/j.jpcs.2008.06.092

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate the singlet-pairing superfluid state of two-component correlated fermions with repulsive interactions in a one-dimensional harmonic potential. By introducing a BCS-type wave function with spatially modulated order parameter, we show how the spin-singlet pairs are formed in the inhomogeneous potential. We then perform variational calculations with particular emphasis on the effect of particle correlations in order to examine the stability of the superfluid state. (C) 2008 Elsevier Ltd. All rights reserved.

引用

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页码：3388 / 3391

页数：4

相关论文

共 26 条

[1]

ANDERSEN BM, CONDMAT07063611

[2] Imaging the Mott insulator shells by using atomic clock shifts [J].

Campbell, Gretchen K. ;

Mun, Jongchul ;

Boyd, Micah ;

Medley, Patrick ;

Leanhardt, Aaron E. ;

Marcassa, Luis G. ;

Pritchard, David E. ;

Ketterle, Wolfgang .

SCIENCE, 2006, 313 (5787) :649-652

[3] Evidence for superfluidity of ultracold fermions in an optical lattice [J].

Chin, J. K. ;

Miller, D. E. ;

Liu, Y. ;

Stan, C. ;

Setiawan, W. ;

Sanner, C. ;

Xu, K. ;

Ketterle, W. .

NATURE, 2006, 443 (7114) :961-964

[4]

FAZEKAS P, 1988, INT J MOD PHYS B, V2, P485

[5] Variational Monte Carlo study of Hubbard model with harmonic confinement [J].

Fujihara, Yusuke ;

Koga, Akihisa ;

Kawakami, Norio .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) :882-884

[6] Variational Monte Carlo analysis of Hubbard model with confining potential: One-dimensional fermionic optical lattice systems [J].

Fujihara, Yusuke ;

Koga, Akihisa ;

Kawakami, Norio .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2007, 76 (03)

[7] Phase coherence of an atomic Mott insulator -: art. no. 050404 [J].

Gerbier, F ;

Widera, A ;

Fölling, S ;

Mandel, O ;

Gericke, T ;

Bloch, I .

PHYSICAL REVIEW LETTERS, 2005, 95 (05)

[8] 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

[9] Bose-Fermi mixtures in a three-dimensional optical lattice [J].

Guenter, Kenneth ;

Stoeferle, Thilo ;

Moritz, Henning ;

Koehl, Michael ;

Esslinger, Tilman .

PHYSICAL REVIEW LETTERS, 2006, 96 (18)

[10] CLOSE RELATION BETWEEN LOCALIZED-ELECTRON MAGNETISM AND THE PARAMAGNETIC WAVEFUNCTION OF COMPLETELY ITINERANT ELECTRONS [J].

KAPLAN, TA ;

HORSCH, P ;

FULDE, P .

PHYSICAL REVIEW LETTERS, 1982, 49 (12) :889-892