31 citations · 126 across the 17 of their papers we have counts for
11 papers · 1 filter
Classical Inputs and Measurements Enable Phase Sensitivity beyond the Shot-Noise Limit
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +2
Coherent-state-based phase estimation is a fruitful testbed for the field of precision measurements since coherent states are robust to decoherence when compared with exotic quantu…
Squeezing enhanced atom-cavity interaction in coupled cavities with high dissipation rates
Yan Wang, Jin-Lei Wu, Jie Song +3
The realization of the strong coupling regime is requisite for implementing quantum information tasks. Here, a method for enhancing the atom-field coupling in highly dissipative co…
Conclusive nonlinear phase sensitivity limit for a Mach-Zehnder interferometer with single-mode non-vacuum inputs
Jian-Dong Zhang, Zi-Jing Zhang, Jun-Yan Hu +4
Many works have stated that nonlinear interactions can improve phase sensitivity beyond the Heisenberg limit scaling of with being the mean photon number. This raises som…
A nearly optimal and robust protocol for nonlinear phase estimation using coherent states
Jian-Dong Zhang, Zi-Jing Zhang, Jun-Yan Hu +4
We propose a protocol for the second-order nonlinear phase estimation with a coherent state as input and balanced homodyne detection as measurement strategy. The sensitivity is sub…
Deterministic super-resolved estimation towards angular displacements based upon a Sagnac interferometer and parity measurement
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +2
Super-resolved angular displacement estimation is of crucial significances for quantum information process and optical lithography. Here we report on and experimentally demonstrate…
Sub-Heisenberg-limited nonlinear phase estimation: Parity measurement approaches the quantum Cramér-Rao bound
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +2
Quantum-enhanced phase estimation paves the way to ultra-precision sensing and is of great realistic significance. In this paper we investigate theoretically the estimation of a se…
Angular displacement estimation of Heisenberg scaling: Tunable squeezed Bell state via the enhancement of spin and orbital angular momenta
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +1
We demonstrate an angular momentum-enhanced protocol that permits an angular displacement estimation by using tunable squeezed Bell state and parity detection. We consider the reso…
Quantum process tomography with Heisenberg scaling based on Gaussian state and binary detection
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +1
We propose a quantum process tomography scheme that utilizes two-mode squeezed vacuum to realize the parameter estimation with Heisenberg scaling. The objective is to estimate a ro…
Toward demonstrating super-sensitive angular displacement estimation by using orbital angular momentum coherent state and SU(1,1)-SU(2) hybrid interferometer
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +2
In this paper, we propose a protocol for angular displacement estimation based upon orbital angular momentum coherent state and a SU(1,1)-SU(2) hybrid interferometer. This interfer…
Optimal binary strategy for angular displacement estimation based upon fidelity appraisal
Jian-Dong Zhang, Zi-Jing Zhang, Long-Zhu Cen +2
We report on an optimal binary strategy for angular displacement estimation. The measuring system is a modified Mach-Zehnder interferometer fed by a coherent state carrying orbital…
Orbital-angular-momentum-enhanced estimation of sub-Heisenberg-limited angular displacement with two-mode squeezed vacuum and parity detection
Jiandong Zhang, Zijing Zhang, Longzhu Cen +1
We report on an orbital-angular-momentum-enhanced scheme for angular displacement estimation based on two-mode squeezed vacuum and parity detection. The sub-Heisenberg-limited sens…