Acoustic frequency atomic spin oscillator in the quantum regime

被引：2

作者：

Jia, Jun ^{[1
]}

Novikov, Valeriy ^{[1
,2
]}

Brasil, Tulio Brito ^{[1
]}

Zeuthen, Emil ^{[1
]}

Muller, Joerg Helge ^{[1
]}

Polzik, Eugene S. ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Copenhagen, Denmark

[2] Russian Quantum Ctr, Skolkovo, Moscow, Russia

来源：

NATURE COMMUNICATIONS | 2023年 / 14卷 / 01期

基金：

欧洲研究理事会;

关键词：

NOISE; LIGHT; FORCE; STATE;

D O I：

10.1038/s41467-023-42059-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quantum noise reduction and entanglement-enhanced sensing in the acoustic frequency range is an outstanding challenge relevant for a number of applications including magnetometry and broadband noise reduction in gravitational wave detectors. Here we experimentally demonstrate quantum behavior of a macroscopic atomic spin oscillator in the acoustic frequency range. Quantum back-action of the spin measurement, ponderomotive squeezing of light, and virtual spring softening are observed at oscillation frequencies down to the sub-kHz range. Quantum noise sources characteristic of spin oscillators operating in the near-DC frequency range are identified and means for their mitigation are presented.

引用

页数：10

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