A lower bound of concurrence for multipartite quantum systems

Abstract

We present a lower bound of concurrence for four-partite systems in terms of the concurrence for $M(2\le M\le 3)$ part quantum systems and give an analytical lower bound for $2\otimes 2\otimes 2\otimes 2$ mixed quantum sates. It is shown that these lower bounds are able to improve the existing bounds and detect entanglement better. Furthermore, our approach can be generalized to multipartite quantum systems.

arXiv comment9 pages,2 figures

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Cited by in corpus (5)

• Entanglement dynamics of three-qubit states in noisy channels
• Efficient Entanglement Measure for Graph States
• Correlation dynamics of three spin under a classical dephasing environment
• Nonlinear entanglement witnesses for four qubits in mutually unbiased bases
• Projection based lower bounds of concurrence for multipartite quantum systems