189 citations · 1k across the 43 of their papers we have counts for
41 papers
The effect of Quantum Statistics on the sensitivity in an SU(1,1) interferometer
Jie Zeng, Yingxing Ding, Mengyao Zhou +5
We theoretically study the effect of quantum statistics of the light field on the quantum enhancement of parameter estimation based on cat state input the SU(1,1) interferometer. T…
Optimal phase measurements in a lossy Mach-Zehnder interferometer
Wenfeng Huang, Xinyun Liang, Chun-Hua Yuan +2
In this work, we discuss two phase-measurement methods for the Mach-Zehnder interferometer (MZI) in the presence of internal losses and give the corresponding optimum conditions. W…
Ultimate precision limit of SU(2) and SU(1,1) interferometers in noisy metrology
Jie Zeng, Dong Li, L. Q. Chen +2
The quantum Fisher information (QFI) in SU(2) and SU(1,1) interferometers was considered, and the QFI-only calculation was overestimated. In general, the phase estimation as a two-…
Enhanced phase sensitivity in a Mach-Zehnder interferometer via photon recycling
Dong Li, Chun-Hua Yuan, Xiaoping Ma +4
We propose an alternative scheme for phase estimation in a Mach-Zehnder interferometer (MZI) with photon recycling. It is demonstrated that with the same coherent-state input and h…
Protection of noise squeezing in a quantum interferometer with optimal resource allocation
Wenfeng Huang, Xinyun Liang, Baiqiang Zhu +4
Interferometers are crucial for precision measurements, including gravitational waves, laser ranging, radar, and imaging. The phase sensitivity, the core parameter, can be quantum-…
Quantum non-demolition measurement based on an SU(1,1)-SU(2)-concatenated atom-light hybrid interferometer
Gao-Feng Jiao, Keye Zhang, L. Q. Chen +2
Quantum non-demolition (QND) measurement is an important tool in the field of quantum information processing and quantum optics. The atom-light hybrid interferometer is of great in…
Effects of losses on the sensitivity of an actively correlated Mach-Zehnder interferometer
Qiang Wang, Gao-Feng Jiao, Zhifei Yu +3
We theoretically studied the quantum Cramér-Rao bound of an actively correlated Mach-Zehnder interferometer (ACMZI), where the quantum Fisher information obtained by the phase-aver…
Coherence Protection of Electron Spin in Earth-field Range by All-optical Dynamic Decoupling
Peiyu Yang, Guzhi Bao, L. Q. Chen +1
In recent years, unshielded atomic systems have been attracting researchers' attention, in which decoherence is one of the major problems, especially for high precision measurement…
Nonlinear phase estimation enhanced by an actively correlated Mach-Zehnder interferometer
Gao-Feng Jiao, Keye Zhang, L. Q. Chen +2
A nonlinear phase shift is introduced to a Mach-Zehnder interferometer (MZI), and we present a scheme for enhancing the phase sensitivity. In our scheme, one input port of a standa…
Atom-light hybrid quantum gyroscope
Yuan Wu, Jinxian Guo, Xiaotian Feng +3
A new type of atom-light hybrid quantum gyroscope (ALHQG) is proposed due to its high rotation sensitivity. It consists of an optical Sagnac loop to couple rotation rate and an ato…
Angular displacements estimation enhanced by squeezing and parametric amplification
Gao-Feng Jiao, Qiang Wang, L. Q. Chen +2
We theoretically study the angular displacements estimation based on a modified Mach-Zehnder interferometer (MZI), in which two optical parametric amplifiers (PAs) are introduced i…
SU(2)-in-SU(1,1) Nested Interferometer for Highly Sensitive, Loss-Tolerant Quantum Metrology
Wei Du, Jia Kong, Jun Jia +6
We present experimental and theoretical results on a new interferometer topology that nests a SU(2) interferometer, e.g., a Mach-Zehnder or Michelson interferometer, inside a SU(1,…
Quantum dense metrology by an SU(2)-in-SU(1,1) nested interferometer
Wei Du, J. F. Chen, Z. Y. Ou +1
With the help of quantum entanglement, quantum dense metrology (QDM) is a technique that can perform the joint estimates of two conjugate quantities such as phase and amplitude mod…
A novel two-mode squeezed light based on double-pump phase-matching
Xuan-Jian He, Jun Jia, Gao-Feng Jiao +3
A novel two-mode non-degenerate squeezed light is generated based on a four-wave mixing (4WM) process driven by two pump fields crossing at a small angle. By exchanging the roles o…
All-Optical Spin Locking in Alkali-Vapor Magnetometers
Guzhi Bao, Dimitra Kanta, Dionysios Antypas +5
The nonlinear Zeeman effect can induce splittings and asymmetries of magnetic-resonance lines in the geophysical magnetic-field range. We demonstrate a scheme to suppress the nonli…
Phase estimation for an SU(1,1) interferometer in the presence of phase diffusion and photon losses
Xiu-Ling Hu, Dong Li, L. Q. Chen +3
We theoretically study the quantum Fisher information (QFI) of the SU(1,1) interferometer with phase shifts in two arms taking account of realistic noise effects. A generalized pha…
Effects of loss on the phase sensitivity with parity detection in an SU(1,1) interferometer
Dong Li, Chun-hua Yuan, Yao Yao +3
We theoretically study the effects of loss on the phase sensitivity of an SU(1,1) interferometer with parity detection with various input states. We show that although the sensitiv…
Absolute sensitivity of phase measurement in an SU(1,1) type interferometer
Wei Du, Jun Jia, J. F. Chen +2
Absolute sensitivity is measured for the phase measurement in an SU(1,1) type interferometer and the results are compared to that of a Mach-Zehnder interferometer operated under th…
Intramode correlations enhanced phase sensitivities in an SU(1,1) interferometer
Qian-Kun Gong, Dong Li, Chun-Hua Yuan +2
We theoretically derive the lower and upper bounds of quantum Fisher information (QFI) of an SU(1,1) interferometer whatever the input state chosen. According to the QFI, the cruci…
Phase estimation of phase shifts in two arms for an SU(1,1) interferometer with coherent and squeezed vacuum states
Qian-Kun Gong, Dong Li, Chun-Hua Yuan +2
We theoretically present the quantum Cramér-Rao bounds (QCRB) of an SU(1,1) interferometer for Gaussian states input with and without the internal photonic losses. The phase shifts…
Resonance interaction of two dipoles in optically active surroundings
Qi-Zhang Yuan, Chun-Hua Yuan, Weiping Zhang
We study the resonance interaction between two quantum electric dipoles immersed in optically active surroundings. Quantum electrodynamics is employed to deal with dipole-vacuum in…
Characterizing micro-macro transitions with an atomic-vapor-based linear optical amplifier
Zhifan Zhou, Ulrich Vogl, Ryan T. Glasser +4
Fundamentally, the dynamics of micro-macro transitions is instrumental to understanding the process of quantum-to-classical transitions; technologically, it can also facilitate the…
Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection
Dong Li, Bryan T. Gard, Yang Gao +4
We theoretically investigate the phase sensitivity with parity detection on an SU(1,1) interferometer with a coherent state combined with a squeezed vacuum state. This interferomet…
Effects of losses in the hybrid atom-light interferometer
Zhao-Dan Chen, Chun-Hua Yuan, Hong-Mei Ma +4
Enhanced Raman scattering can be obtained by injecting a seeded light field which is correlated with the initially prepared collective atomic excitation. This Raman amplification p…