期刊
PHYSICAL REVIEW A
卷 99, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.99.063811
关键词
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资金
- National Natural Science Foundation of China [11704026, 11304174, 11704205, U1530401]
- China Postdoctoral Science Foundation [2018T110039]
- Natural Science Foundation of Shandong Province [ZR2013AQ010]
- Natural Science Foundation of Ningbo [2018A610199]
A theoretical scheme is proposed to enhance the signal-to-noise ratio in ultrasensitive detection by quantum correlation in a composite optomechanical system. Introducing an auxiliary oscillator and treating it as an added probe for weak-field detection, the additional noise can be greatly suppressed, which may even break the standard quantum limit. A magnetic field is employed as an example to exhibit the detection capability of the scheme. The result shows that, compared with the traditional detection protocol, the scheme has a higher signal-to-noise ratio and a better detection accuracy. Furthermore, the signal intensity detection curve shows a good linearity. The results provide a promising platform for reducing the additional noise by utilizing quantum correlation in ultrasensitive detection.
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