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http://dx.doi.org/10.3807/KJOP.2018.29.2.064

Concurrence of Rank-two Multipartite Quantum States  

Bae, Joonwoo (Department of Applied Mathematics, Hanyang University (ERICA))
Publication Information
Korean Journal of Optics and Photonics / v.29, no.2, 2018 , pp. 64-69 More about this Journal
Abstract
In this work, we derive a general lower bound to concurrence of an arbitrary mixture of two pure states, that is, rank-two multipartite quantum states. We show that the lower bound can tightly detect entanglement of rank-two states, and also can be implemented experimentally with present-day technologies, i.e. single-copy level measurement and classical post-processing.
Keywords
Entanglement theory; Quantum information theory;
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