118 citations · 447 across the 17 of their papers we have counts for
17 papers
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…
Scattering-lens based quantum imaging beyond shot noise
Dong Li, Yao Yao
The scheme of optical imaging using scattering lens can provide a resolution beyond the classical optical diffraction limit with a coherent-state input. Nevertheless, due to the sh…
Excess-noise suppression for a squeezed state propagating through random amplifying media via wave-front shaping
Dong Li, Song Sun, Yao Yao
After propagating through a random amplifying medium, a squeezed state commonly shows excess noise above the shot-noise level. Since large noise can significantly reduce the signal…
Anomalies of weight-based coherence measure and mixed maximally coherent states
Yao Yao, Dong Li, C. P. Sun
As an analogy of best separable approximation (BSA) in the framework of entanglement theory, here we concentrate on the notion of best incoherent approximation, with application to…
Modulating quantum fluctuations of scattered lights in disordered media via wavefront shaping
Dong Li, Yao Yao
After multiple scattering of quadrature-squeezed lights in a disordered medium, the quadrature amplitudes of the scattered modes present an excess noise above the shot-noise level…
Quantum coherence fraction
Yao Yao, Dong Li, C. P. Sun
As an analogy of fully entangled fraction in the framework of entanglement theory, we have introduced the notion of quantum coherence fraction , which quantifies t…
Statistical distribution of quantum correlation induced by multiple scattering in the disordered medium
Dong Li, Yao Yao, Mo Li
For the quantum correlations between scattered modes in the disordered media, the previous works focus mainly on the cases where the inputs are non-superposed states, for instance,…
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…
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…
Photon Added Coherent States: Nondeterministic, Noiseless Amplification in Quantum Metrology
Bryan T. Gard, Dong Li, Chenglong You +13
Probabilistic amplification through photon addition, at the output of an Mach-Zehnder interferometer is discussed for a coherent input state. When a metric of signal to noise ratio…
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…
SU(1,1)-type light-atom correlated interferometer
Hongmei Ma, Dong Li, Chun-Hua Yuan +3
The quantum correlation of light and atomic collective excitation can be used to compose an SU(1,1)-type hybrid light-atom interferometer, where one arm in optical SU(1,1) interfer…
The phase sensitivity of an SU(1,1) interferometer with homodyne detection
Dong Li, Chun-Hua Yuan, Z. Y. Ou +1
We theoretically study the phase sensitivity of the SU(1,1) interferometer with a coherent light together with a squeezed vacuum input case using the method of homodyne. We find th…