Long phase coherence time and number squeezing of two Bose-Einstein condensates on an atom chip

被引：276

作者：

Jo, G. -B.

Shin, Y.

Will, S.

Pasquini, T. A.

Saba, M.

Ketterle, W.

Pritchard, D. E.

Vengalattore, M.

Prentiss, M.

机构：

[1] MIT, Harvard Ctr Ultracold Atoms, Dept Phys, Elect Res Lab, Cambridge, MA 02139 USA

[2] Harvard Univ, MIT, Harvard Ctr Ultracold Atoms, Jefferson Lab,Phys Dept, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.98.030407

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the relative phase of two Bose-Einstein condensates confined in a radio frequency induced double-well potential on an atom chip. We observe phase coherence between the separated condensates for times up to similar to 200 ms after splitting, a factor of 10 longer than the phase diffusion time expected for a coherent state for our experimental conditions. The enhanced coherence time is attributed to number squeezing of the initial state by a factor of 10. In addition, we demonstrate a rotationally sensitive (Sagnac) geometry for a guided atom interferometer by propagating the split condensates.

引用

页数：4

共 28 条

[1] STARK EFFECT IN RAPIDLY VARYING FIELDS [J].