Quantum-enhanced magnetometer with low-frequency squeezing

被引：69

作者：

Horrom, Travis ^{[1
]}

Singh, Robinjeet ^{[2
,3
]}

Dowling, Jonathan P. ^{[2
,3
,4
]}

Mikhailov, Eugeniy E. ^{[1
]}

机构：

[1] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[2] Louisiana State Univ, Hearne Inst Theoret Phys, Baton Rouge, LA 70803 USA

[3] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[4] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW A | 2012年 / 86卷 / 02期

基金：

美国国家科学基金会;

关键词：

POLARIZATION SELF-ROTATION; LIGHT; NOISE;

D O I：

10.1103/PhysRevA.86.023803

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the demonstration of a magnetometer with noise-floor reduction below the shot-noise level. This magnetometer, based on a nonlinear magneto-optical rotation effect, is enhanced by the injection of a squeezed vacuum state into its input. The noise spectrum shows squeezed noise reduction of about 2 +/- 0.35 dB spanning from close to 100 Hz to several megahertz. We also report on the observation of two different regimes of operation of such a magnetometer: one in which the detection noise is limited by the quantum noise of the light probe only, and one in which we see additional noise originating from laser noise which is rotated into the vacuum polarization.

引用

页数：5

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