97 citations · 441 across the 26 of their papers we have counts for
26 papers · 1 filter
Monogamy of quantum entanglement
Xiao-Lan Zong, Hao-Hao Yin, Wei Song +1
Unlike classical correlation, quantum entanglement cannot be freely shared among many parties. This restricted shareability of entanglement among multi-party systems is known as mo…
Verification of Group Non-membership by Shallow Quantum Circuits
Kai Sun, Zi-Jian Zhang, Fei Meng +6
Decision problems are the problems whose answer is either YES or NO. As the quantum analogue of (nondeterministic polynomial time), the class (quantum…
Computable steering criterion for bipartite quantum systems
Guo-Zhu Pan, Jun-Long Zhao, Zhi Lin +3
Quantum steering describes the ability of one observer to nonlocally affect the other observer's state through local measurements, which represents a new form of quantum nonlocal c…
Entanglement swapping via three-step quantum walk-like protocol
Xiao-Man Li, Ming Yang, Nikola Paunkovic +2
We present an entanglement swapping process for unknown nonmaximally entangled photonic states, where the standard Bell-state measurement is replaced by a three-step quantum walk-l…
Polygamy relation for the Rényi- entanglement of assistance in multi-qubit systems
Wei Song, Jian Zhou, Ming Yang +4
We prove a new polygamy relation of multi-party quantum entanglement in terms of Rényi- entanglement of assistance for $\left( {\sqrt 7 - 1} \right)/2\leqα\leq \left( {\sqrt 13…
Lower and upper bounds for entanglement of Rényi- entropy
Wei Song, Lin Chen, Zhuo-Liang Cao
Entanglement Rényi- entropy is an entanglement measure. It generalizes the entanglement of formation, and they coincide when tends to 1. We derive analytical lower and upper…
General monogamy relation of multi-qubit systems in terms of squared Rényi- entanglement
Wei Song, Yan-Kui Bai, Mou Yang +2
We prove that the squared Rényi- entanglement (SRE), which is the generalization of entanglement of formation (EOF), obeys a general monogamy inequality in an arbitrary -q…
Motion-enhanced quantum entanglement in the dynamics of excitation transfer
Wei Song, Yi-Sheng Huang, Ming Yang +1
We investigate the dynamics of entanglement in the excitation transfer through a chain of interacting molecules. In the case of two-molecule coupled to noisy environments we show t…
Purifying entanglement of noisy two-qubit states via entanglement swapping
Wei Song, Ming Yang, Zhuo-Liang Cao
Two qubits in pure entangled states going through separate paths and interacting with their own individual environments will gradually lose their entanglement. Here we show that th…
Operator entanglement of two-qubit joint unitary operations revisited: Schmidt number approach
Hui-Zhi Xia, Chao Li, Qing Yang +2
Operator entanglement of two-qubit joint unitary operations is revisited. Schmidt number is an important attribute of a two-qubit unitary operation, and may have connection with th…
Conditions for the freezing phenomena of geometric measure of quantum discord for arbitrary two-qubit X states under non-dissipative dephasing noises
Wei Song, Zhuo-Liang Cao
We study the dynamics of geometric measure of quantum discord (GMQD) under the influences of two local phase damping noises. Consider the two qubits initially in arbitrary X-states…
Nonlocality Distillation for High-Dimensional System
Guo-Zhu Pan, Chao Li, Zheng-Gen Chen +2
The intriguing and powerful capability of nonlocality in communication field ignites the research of the nonlocality distillation. The first protocol presented in Ref[Phys. Rev. Le…
Geometric measure of quantum discord and the geometry of a class of two-qubit states
Wei Song, Long-Bao Yu, Ping Dong +3
We investigate the geometric picture of the level surfaces of quantum entanglement and geometric measure of quantum discord (GMQD) of a class of X-states, respectively. This pictor…
Multipartite nonlocality swapping
Chao Li, Ming Yang, Qing Yang +1
Nonlocality swapping of bipartite binary correlated boxes can be realized by a \emph{coupler} () in nonsignaling models. By studying the swapping process we find that the previo…
Storage and retrieval of continuous-variable polarization-entangled cluster states in atomic ensembles
Da-Chuang Li, Chun-Hua Yuan, Zhuo-Liang Cao +1
We present a proposal for storing and retrieving a continuous-variable quadripartite polarization-entangled cluster state, using macroscopic atomic ensembles in a magnetic field. T…
Dynamics of quantum discord in the purification process
Wei Song, Lin Chen, Ming Yang +1
We investigate the dynamics of quantum discord during the purification process. In the case of Werner states, it is shown that quantum discord is increased after a round of purific…
Optimal reconstruction of states in qutrits system
Fei Yan, Ming Yang, Zhuo-Liang Cao
Based on mutually unbiased measurements, an optimal tomographic scheme for the multiqutrit states is presented explicitly. Because the reconstruction process of states based on mut…
Entanglement in the anisotropic Heisenberg XYZ model with different Dzyaloshinskii-Moriya interaction and inhomogeneous magnetic field
Da-Chuang Li, Zhuo-Liang Cao
We investigate the entanglement in a two-qubit Heisenberg XYZ system with different Dzyaloshinskii-Moriya(DM) interaction and inhomogeneous magnetic field. It is found that the con…
General quantum phase estimation and calibration of a timepiece in a quantum dot system
Ping Dong, Zhuo-Liang Cao
We present a physical scheme for implementing quantum phase estimation via weakly coupled double quantum-dot molecules embedded in a microcavity. During the same process of impleme…
Teleportation of two-particle entangled state via cluster state
Da-Chuang Li, Zhuo-Liang Cao
We present two schemes for teleporting an unknown two-particle entangled state from a sender (Alice) to a receiver (Bob) via a four-particle entangled cluster state. As it is shown…
Quantum controlled phase gate and cluster states generation via two superconducting quantum interference devices in a cavity
Zheng-Yuan Xue, Gang Zhang, Ping Dong +2
A scheme for implementing 2-qubit quantum controlled phase gate (QCPG) is proposed with two superconducting quantum interference devices (SQUIDs) in a cavity. The gate operations a…
Implementation of quantum algorithms with resonant interactions
Zhuo-Liang Cao, Ping Dong
We propose a scheme for implementing quantum algorithms with resonant interactions. Our scheme only requires resonant interactions between two atoms and a cavity mode, which is sim…
Quantum dense coding scheme via cavity decay
Zheng-Yuan Xue, You-Min Yi, Zhuo-Liang Cao
We investigate a secure scheme for implementing quantum dense coding via cavity decay and liner optics devices. Our scheme combines two distinct advantages: atomic qubit sevres as…
Scheme for implementing quantum information sharing via tripartite entangled state in cavity QED
Zheng-Yuan Xue, You-Min Yi, Zhuo-Liang Cao
We investigate economic protocol to securely distribute and reconstruct a single-qubit quantum state between two users via a tripartite entangled state in cavity QED. Our scheme is…