Open AccessConcurrence of the mixed state of two non-orthogonal pure states
Author(s) -
Di Yao-Min,
B. L. Hu,
Dongdong Liu,
Yan Shi-Ming
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.3869
Subject(s) - concurrence , state (computer science) , expression (computer science) , qubit , cluster state , quantum entanglement , physics , quantum mechanics , mathematics , computer science , quantum , algorithm , programming language
In this article an obvious expression of concurrence of the mixed state of two non-orthogonal pure states in two qubits is derived. The result reveals that the expression of concurrence of the mixed state of two orthogonal states can be directly generalized to the case of the mixed state of two non-orthogonal states. Then the maximally entangled states mixed by two pure states and the concurrences in some important special cases are discussed.