Projection based lower bounds of concurrence for multipartite quantum systems

• URL: http://arxiv.org/abs/2004.13269v1
• Date: Tue, 28 Apr 2020 03:44:04 GMT
• Title: Projection based lower bounds of concurrence for multipartite quantum systems
• Authors: Hui Zhao, MeiMing Zhang, Shao-Ming Fei, Naihuan Jing
• Abstract summary: We study the concurrence of arbitrary-dimensional multipartite quantum states. By detailed examples we show that our results improve the existing lower bounds of concurrence.
• Score: 1.4550422197805504
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the concurrence of arbitrary-dimensional multipartite quantum states. Analytical lower bounds of concurrence for tripartite quantum states are derived by projecting high-dimensional states to $2\otimes 2\otimes 2$ substates. The results are then generalized to arbitrary multipartite quantum systems. Furthermore, the scheme enables us obtain lower bounds of concurrence for arbitrary four-partite quantum states by projecting high-dimensional states to arbitrary given lower dimensional substates. By detailed examples we show that our results improve the existing lower bounds of concurrence.

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