Signatures of spatial inversion asymmetry of an optical lattice observed in matter-wave diffraction

被引：3

作者：

Thomas, C. K. ^{[1
]}

Barter, T. H. ^{[1
]}

Leung, T. -H. ^{[1
]}

Daiss, S. ^{[2
]}

Stamper-Kurn, D. M. ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW A | 2016年 / 93卷 / 06期

基金：

美国国家科学基金会;

关键词：

ULTRACOLD QUANTUM GASES; STANDING LIGHT-WAVE; ATOM;

D O I：

10.1103/PhysRevA.93.063613

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The structure of a two-dimensional honeycomb optical lattice potential with small inversion asymmetry is characterized using coherent diffraction of Rb-87 atoms. We demonstrate that even a small potential asymmetry, with peak-to-peak amplitude of <= 2.3% of the overall lattice potential, can lead to pronounced inversion asymmetry in the momentum-space diffraction pattern. The observed asymmetry is explained quantitatively by considering both Kapitza-Dirac scattering in the Raman-Nath regime and also either perturbative or full-numerical treatment of the band structure of a periodic potential with a weak inversion-symmetry-breaking term. Our results have relevance for both the experimental development of coherent atom optics and the proper interpretation of time-of-flight assays of atomic materials in optical lattices.

引用

页数：5

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