Simulation and detection of Dirac fermions with cold atoms in an optical lattice

被引：285

作者：

Zhu, Shi-Liang ^{[1
]}

Wang, Baigeng

Duan, L.-M.

机构：

[1] S China Normal Univ, ICMP, Guangzhou, Peoples R China

[2] S China Normal Univ, Dept Phys, LPIT, Guangzhou, Peoples R China

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210008, Peoples R China

[4] Nanjing Univ, Dept Phys, Nanjing 210008, Peoples R China

[5] Univ Michigan, FOCUS Ctr, Ann Arbor, MI 48109 USA

[6] Univ Michigan, Dept Phys, MCTP, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 26期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.98.260402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose an experimental scheme to simulate and observe relativistic Dirac fermions with cold atoms in a hexagonal optical lattice. By controlling the lattice anisotropy, one can realize both massive and massless Dirac fermions and observe the phase transition between them. Through explicit calculations, we show that both the Bragg spectroscopy and the atomic density profile in a trap can be used to demonstrate the Dirac fermions and the associated phase transition.

引用

页数：4

共 27 条

[1] Bose-Einstein condensation of atomic gases [J].

Anglin, JR ;

Ketterle, W .

NATURE, 2002, 416 (6877) :211-218

[2] Ultracold quantum gases in optical lattices [J].

Bloch, I .

NATURE PHYSICS, 2005, 1 (01) :23-30

[3] Controlling spin exchange interactions of ultracold atoms in optical lattices [J].

Duan, LM ;

Demler, E ;

Lukin, MD .

PHYSICAL REVIEW LETTERS, 2003, 91 (09)

[4] Unconventional integer quantum Hall effect in graphene [J].

Gusynin, VP ;

Sharapov, SG .

PHYSICAL REVIEW LETTERS, 2005, 95 (14)

[5] Cold bosonic atoms in optical lattices [J].

Jaksch, D ;

Bruder, C ;

Cirac, JI ;

Gardiner, CW ;

Zoller, P .

PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3108-3111

[6] Creation of effective magnetic fields in optical lattices: the Hofstadter butterfly for cold neutral atoms [J].

Jaksch, D ;

Zoller, P .

NEW JOURNAL OF PHYSICS, 2003, 5 :56.1-56.11

[7] Slow light in degenerate Fermi gases -: art. no. 033602 [J].

Juzeliunas, G ;

Öhberg, P .

PHYSICAL REVIEW LETTERS, 2004, 93 (03) :033602-1

[8] Quantum spin Hall effect in graphene [J].

Kane, CL ;

Mele, EJ .

PHYSICAL REVIEW LETTERS, 2005, 95 (22)

[9] Chiral tunnelling and the Klein paradox in graphene [J].

Katsnelson, M. I. ;

Novoselov, K. S. ;

Geim, A. K. .

NATURE PHYSICS, 2006, 2 (09) :620-625

[10]

LIFSHITZ IM, 1960, SOV PHYS JETP-USSR, V11, P1130

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