Spin-Orbit Coupling and Quantum Spin Hall Effect for Neutral Atoms without Spin Flips

被引:127
|
作者
Kennedy, Colin J. [1 ]
Siviloglou, Georgios A. [1 ]
Miyake, Hirokazu [1 ]
Burton, William Cody [1 ]
Ketterle, Wolfgang [1 ]
机构
[1] MIT, Dept Phys, Elect Res Lab, MIT Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA
基金
美国国家科学基金会;
关键词
ELECTRONS;
D O I
10.1103/PhysRevLett.111.225301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We propose a scheme which realizes spin-orbit coupling and the quantum spin Hall effect for neutral atoms in optical lattices without relying on near resonant laser light to couple different spin states. The spin-orbit coupling is created by modifying the motion of atoms in a spin-dependent way by laser recoil. The spin selectivity is provided by Zeeman shifts created with a magnetic field gradient. Alternatively, a quantum spin Hall Hamiltonian can be created by all-optical means using a period-tripling, spin-dependent superlattice.
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页数:5
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