Observation of photon-assisted tunneling in optical lattices

被引：212
|
作者：
Sias, C. [1 ]
Lignier, H. [1 ]
Singh, Y. P. [1 ]
Zenesini, A. [1 ]
Ciampini, D. [1 ,2 ]
Morsch, O. [1 ]
Arimondo, E. [1 ,2 ]
机构：
[1] Univ Pisa, Dipartimento Fis E Fermi, CNR, INFM, I-56127 Pisa, Italy
[2] CNISM Unita Pisa, Pisa, Italy
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.100.040404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have observed tunneling suppression and photon-assisted tunneling of Bose-Einstein condensates in an optical lattice subjected to a constant force plus a sinusoidal shaking. For a sufficiently large constant force, the ground energy levels of the lattice are shifted out of resonance and tunneling is suppressed; when the shaking is switched on, the levels are coupled by low-frequency photons and tunneling resumes. Our results agree well with theoretical predictions and demonstrate the usefulness of optical lattices for studying solid-state phenomena.
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页数：4
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