Retrieving Ideal Precision in Noisy Quantum Optical Metrology

Quantum metrology employs quantum effects to attain a measurement precision surpassing the limit achievable in classical physics. However, it was previously found that the precision returns the shot-noise limit (SNL) from the ideal Zeno limit (ZL) due to the photon loss in quantum metrology based on...

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Bibliographic Details
Published in:Physical review letters 2019-07, Vol.123 (4), p.040402-040402, Article 040402
Main Authors: Bai, Kai, Peng, Zhen, Luo, Hong-Gang, An, Jun-Hong
Format: Article
Language:English
Subjects:
Markov processes
Metrology
Noise
Photonics
Photons
Reservoir engineering
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Summary:Quantum metrology employs quantum effects to attain a measurement precision surpassing the limit achievable in classical physics. However, it was previously found that the precision returns the shot-noise limit (SNL) from the ideal Zeno limit (ZL) due to the photon loss in quantum metrology based on Mech-Zehnder interferometry. Here, we find that not only can the SNL be beaten, but also the ZL can be asymptotically recovered in a long-encoding-time condition when the photon dissipation is exactly studied in its inherent non-Markovian manner. Our analysis reveals that it is due to the formation of a bound state of the photonic system and its dissipative noise. Highlighting the microscopic mechanism of the dissipative noise on the quantum optical metrology, our result supplies a guideline to realize the ultrasensitive measurement in practice by forming the bound state in the setting of reservoir engineering.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.123.040402