Orbital-angular-momentum-enhanced phase estimation using non-Gaussian states with photon loss

作     者：Yong-Jian Chen Jin-Wei Gao Jin-Xuan Han Zhong-Hui Yuan Ruo-Qi Li Yong-Yuan Jiang Jie Song 

作者机构：School of Physics Harbin Institute of Technology Harbin 150001 China School of Electronic Information Engineering China West Normal University Nanchong 637002 Sichuan China Key Laboratory of Micro-Nano Optoelectronic Information System Ministry of Industry and Information Technology Harbin 150001 China Key Laboratory of Micro-Optics and Photonic Technology of Heilongjiang Province Harbin Institute of Technology Harbin 150001 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi 030006 China 

出 版 物：《Physical Review A》 (Phys. Rev. A)

年 卷 期：2023年第108卷第2期

页      面：022613-022613页

核心收录：

基　　金：Harbin Institute of Technology, HIT, (A201412) Postdoctoral Scientific Research Development Fund of Heilongjiang Province, (LBH-Q15060) National Natural Science Foundation of China, NSFC, (11675046) Fundamental Research Funds for the Central Universities, (2023FRFK06012) 

主　　题：Quantum information theory Quantum metrology 

摘      要：This study investigates the use of orbital angular momentum (OAM) to enhance phase estimation in Mach-Zehnder interferometers by employing non-Gaussian states as input resources in the presence of noise. Our research demonstrates that non-Gaussian states, particularly the photon-subtraction-then-addition state, exhibit the best sensitivity in the presence of symmetric noise. Additionally, a higher order of the Bose operator of non-Gaussian states provides better sensitivity for symmetric noise. OAM can mitigate the deterioration of noise, making it possible to estimate small phase shifts θ→0. OAM enhances the resolution and sensitivity of all input states and mitigates the deterioration caused by photon loss. Additionally, OAM enhances the resolution and sensitivity of all input states, enabling the sensitivity to approach the 1/N limit even under significant photon loss (e.g., 50% symmetric photon loss). These results hold promise for enhancing the sensitivity and robustness of quantum metrology, particularly in the presence of significant photon loss.