Contrast interferometry using Bose-Einstein condensates to measure h/m and α -: art. no. 140401

被引：147

作者：

Gupta, S

Dieckmann, K

Hadzibabic, Z

Pritchard, DE

机构：

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

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.89.140401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The kinetic energy of an atom recoiling due to absorption of a photon was measured as a frequency, using an interferometric technique called "contrast interferometry." Optical standing wave pulses were used to create a symmetric three-path interferometer with a Bose-Einstein condensate. Its recoil phase, measurable with a single shot, varies quadratically with additional recoils and is insensitive to errors from vibrations and ac Stark shifts. We have measured the photon recoil frequency of sodium to 7 ppm precision, using a simple realization of this scheme. Plausible extensions should yield sufficient precision to attain a ppb-level determination of h/m and the fine structure constant alpha.

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