Squeezed-light spin noise spectroscopy

被引：53

作者：

Giovanni Lucivero, Vito ^{[1
]}

Jimenez-Martinez, Ricardo ^{[1
]}

Kong, Jia ^{[1
]}

Mitchell, Morgan W. ^{[1
,2
]}

机构：

[1] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain

[2] Inst Catalana Recerca & Estudis Avancats, Barcelona 08015, Spain

来源：

PHYSICAL REVIEW A | 2016年 / 93卷 / 05期

基金：

欧洲研究理事会;

关键词：

MAGNETIC-RESONANCE; QUANTUM-NOISE; ENSEMBLES;

D O I：

10.1103/PhysRevA.93.053802

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report quantum enhancement of Faraday rotation spin noise spectroscopy by polarization squeezing of the probe beam. Using natural abundance Rb in 100 Torr of N-2 buffer gas and squeezed light from a subthreshold optical parametric oscillator stabilized 20 GHz to the blue of the D-1 resonance, we observe that an input squeezing of 3.0 dB improves the signal-to-noise ratio by 1.5 to 2.6 dB over the combined (power)circle times(number density) ranges (0.5-4.0 mW)circle times(1.5 x 10(12) cm(-3) to 1.3 x 10(13) cm(-3)), covering the ranges used in optimized spin noise spectroscopy experiments. We also show that squeezing improves the tradeoff between statistical sensitivity and broadening effects, a previously unobserved quantum advantage.

引用

页数：7

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