QUANTUM-NONDEMOLITION MEASUREMENTS USING GHOST TRANSITIONS

被引:33
作者
GHERI, KM
GRANGIER, P
POIZAT, JP
WALLS, DF
机构
[1] INST OPT, F-91403 ORSAY, FRANCE
[2] UNIV COLORADO, JOINT INST LAB ASTROPHYS, BOULDER, CO 80309 USA
来源
PHYSICAL REVIEW A | 1992年 / 46卷 / 07期
关键词
D O I
10.1103/PhysRevA.46.4276
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present a detailed analysis of the quantum-nondemolition (QND) properties of a measurement scheme employing coherently driven three-level atoms in the LAMBDA or cascade configuration inside an optical cavity. We propose to use a strong signal field to empty one of the transitions and dress the signal-transition levels. The atoms become transparent for the signal beam, which sees a "ghost transition." When a probe is applied and tuned to the vicinity of one of the light-shifted levels, the probe phase is extremely sensitive to fluctuations of the signal intensity. This enhances the QND coupling and enables the system to operate at lower cooperativities.
引用
收藏
页码:4276 / 4285
页数:10
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