Particle number fractionalization of an atomic Fermi-Dirac gas in an optical lattice

被引:118
作者
Ruostekoski, J [1 ]
Dunne, GV
Javanainen, J
机构
[1] Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England
[2] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA
关键词
D O I
10.1103/PhysRevLett.88.180401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that a dilute two-species gas of Fermi-Dirac alkali-metal atoms in a periodic optical lattice may exhibit fractionalization of the particle number when the two components are coupled via a coherent electromagnetic field with a topologically nontrivial phase profile. This results in fractional eigenvalues of the spin operator with vanishing fluctuations. The fractional part can be accurately controlled by modifying the effective detuning of the electromagnetic field.
引用
收藏
页码:1804011 / 1804014
页数:4
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