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
收藏
页数：10
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