2019/01/31 by Kai Bai, Zhen Peng, Hong-Gang Luo +3 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Detector #Dissipative system #Ideal (ethics) #Interferometry #Limit (mathematics) #Mathematics #Metrology #Noise (video) #Open quantum system #Optics #Photon #Photonics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Zeno effect #Quantum decoherence #Quantum limit #Quantum mechanics #Quantum metrology #Quantum optics #Quantum sensor #Quantum technology #Shot noise #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physrevlett.123.040402
published as Phys. Rev. Lett. 123, 040402 (2019) · To appear in Phys. Rev. Lett. 6 pages and 3 figures in the main text. 3 pages and 1 figure in the supplemental material
openalex created_date 2019/02/21 · arxiv created 2019/06/26 · openalex publication_date 2019/07/24 · arxiv updated 2019/07/26 · openalex updated_date 2026/08/05
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.