Quantum correlation swapping

Xie, Chen; Liu, Yimin; Xing, Hang; Chen, Jianlan; Zhang, Zhanjun

doi:10.1007/s11128-014-0875-y

Cited by 20 publications

(14 citation statements)

References 62 publications

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“…As the quantum entanglement was generalized to quantum correlation, which can be quantum entanglement or QCDE, quantum entanglement swapping can also be generalized to quantum correlation swapping [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]. In quantum correlation swapping, the concerned quantum correlation may be quantum entanglement, QCDE, or both.…”

Section: Introductionmentioning

confidence: 99%

Quantum Correlation Swapping between Two Werner States Undergoing Local and Nonlocal Unitary Operations

Xie

Zhang

Chen

et al. 2022

Entropy

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In this paper, quantum correlation (QC) swapping between two Werner-like states, which are transformed from Werner states undergoing local and nonlocal unitary operations, are studied. Bell states measures are performed in the middle node to realize the QC swapping and correspondingly final correlated sates are obtained. Two different QC quantifiers, i.e., measurement-induced disturbance (MID) and ameliorated MID, are employed to characterize and quantify all the concerned QCs in the swapping process. All QCs in the concerned states are evaluated analytically and numerically. Correspondingly, their characteristics and properties are exposed in detail. It is exposed that, through the QC swapping process, one can obtain the long-distance QC indeed. Moreover, the similarities of monotony features of MID and AMID between the initial states and final states are exposed and analyzed.

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Section: Introductionmentioning

confidence: 99%

Quantum Correlation Swapping between Two Werner States Undergoing Local and Nonlocal Unitary Operations

Xie

Zhang

Chen

et al. 2022

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“…Recently, quantum entanglement swapping was generalized to QC swapping [ 24 , 25 , 26 ]. In QC swapping, the relevant QCs can be quantum entanglement, QCBEs, or both of them.…”

Section: Introductionmentioning

confidence: 99%

Increasing Quantum Correlations Based on Measurement-Induced Disturbance via a Swapping Procedure with Two-Qubit Mixed States

Xie

Zhang

et al. 2021

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In this paper, quantum correlation (QC) swapping for certain separable two-qubit mixed states is treated. A QC quantifier, measurement-induced disturbance (MID) (Luo in Phys Rev A 77:022301, 2008), is employed to characterize and quantify QCs in the relevant states. Properties of all QCs in the swapping process are revealed. Particularly, it is found that MID can be increased through QC swapping for certain separable two-qubit mixed states.

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“…This phenomenon of entanglement was first introduced in 1935 by Einstein, Podolsky, and Rosen [7] and later by Schrödinger. [8] Entanglement has been recognized as an indispensable resource, enabling tasks like quantum cryptography, [9] quantum information processing, [10,11] quantum teleportation, [12] measurement-based quantum computation. [20] Nonetheless, quantum entanglement does not exhaust the realm of quantum correlations.…”

Section: Introductionmentioning

confidence: 99%

Effects of classical random external field on the dynamics of entanglement in a four-qubit system

Fosso¹,

Nya²,

Kenfack³

et al. 2021

Chinese Phys. B

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We investigate the dynamics of entanglement through negativity and witness operators in a system of four non-interacting qubits driven by a classical phase noisy laser characterized by a classical random external field (CREF). The qubits are initially prepared in the GHZ-type and W-type states and interact with the CREF in two different qubit-field configurations, namely, common environment and independent environments in which the cases of equal and different field phase probabilities are distinguished. We find that entanglement exhibits different decaying behavior, depending on the input states of the qubits, the qubit-field coupling configuration, and field phase probabilities. On the one hand, we demonstrate that the coupling of the qubits in a common environment is an alternative and more efficient strategy to completely shield the system from the detrimental impacts of the decoherence process induced by a CREF, independent of the input state and the field phase probabilities considered. Also, we show that GHZ-type states have strong dynamics under CREF as compared to W-type states. On the other hand, we demonstrate that in the model investigated the system robustness’s can be greatly improved by increasing the number of qubits constituting the system.

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Quantum correlation swapping

Cited by 20 publications

References 62 publications

Quantum Correlation Swapping between Two Werner States Undergoing Local and Nonlocal Unitary Operations

Quantum Correlation Swapping between Two Werner States Undergoing Local and Nonlocal Unitary Operations

Increasing Quantum Correlations Based on Measurement-Induced Disturbance via a Swapping Procedure with Two-Qubit Mixed States

Effects of classical random external field on the dynamics of entanglement in a four-qubit system

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