59 citations · 234 across the 10 of their papers we have counts for
10 papers
Optimal unidirectional amplification induced by optical gain in optomechanical systems
L. N. Song, Qiang Zheng, Xun-Wei Xu +2
We propose a three-mode optomechanical system to realize optical nonreciprocal transmission with unidirectional amplification, where the system consists of two coupled cavities and…
Optomechanically induced nonreciprocity in a three-mode optomechanical system
Xun-Wei Xu, L. N. Song, Qiang Zheng +2
We propose to create optical nonreciprocity in a three-mode optomechanical system comprising one mechanical and two optical modes, where the mechanical mode is coupled with only on…
Detecting macroscopic quantum coherence with a cavity optomechanical system
Qiang Zheng, Jianwei Xu, Yao Yao +1
The rigorous resource framework of quantum coherence has been set up recently and excited a wide variety of interests. Here we show that a quantum cavity optomechanical system, as…
Approaching quantum-limited amplification with large gain catalyzed by hybrid nonlinear media in cavity optomechanics
Qiang Zheng, Kai Li, Yong Li
Amplifier is at the heart of almost all experiment carrying out the precise measurement of a weak signal. An idea amplifier should have large gain and minimum added noise simultane…
Invertible condition of quantum Fisher information matrix for a mixed qubit
Ping Yue, Li Ge, Qiang Zheng
Estimating multiparamter simultaneously as precise as possible is an important goal of quantum metrolo- gy. As a first step to this end, here we give a condition determining whethe…
The energy level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
Z. H. Wang, Q. Zheng, Xiaoguang Wang +1
We study the energy level crossing behavior in two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anis…
Enhancing parameter precision of optimal quantum estimation by direct quantum feedback
Qiang Zheng, Li Ge, Yao Yao +1
Various schemes have been proposed to overcome the drawback of the decoherence on quantum-enhanced parameter estimation. Here we suggest an alternative method, quantum feedback, to…
Renormalized quantum Fisher information manifestation of Berezinskii-Kosterlitz-Thouless phase transition for spin-1/2 XXZ chain
Qiang Zheng, Yao Yao, Xun-Wei Xu +1
Combining the ideas of quantum Fisher information and quantum renormalization group method, the Berezinskii-Kosterlitz-Thouless quantum phase transition of spin- 1/2 XXZ chain is i…
Optimal quantum parameter estimation of two interacting qubits under decoherence
Zheng Qiang, Yao Yao, Yong Li
We investigate the parameter estimation problem in a two-qubit system, in which each qubit is independently interacting with its Markovian environment. We study in detail the sensi…
Effect of final state interactions on particle production in +Au collisions at RHIC
Xiaoping Zhang, Jinhui Chen, Zhongzhou Ren +4
We show that particle species dependence of enhanced hadron production at intermediate transverse momentum (p_{T}) for d+Au collisions at RHIC can be understood in terms of the had…