Randomly Generating Four Mixed Bell-Diagonal States with a Concurrences Sum to Unity

A two-qubit system in quantum information theory is the simplest bipartite quantum system and its concurrence for pure and mixed states is well known. As a subset of two-qubit systems, Bell-diagonal states can be depicted by a very simple geometrical representation of a tetrahedron with sides of l...

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Bibliographic Details
Main Authors: Toh, S. P., Hishamuddin, Zainuddin, Foo, Kim Eng
Format: Article
Language:English
Published: IOP Publishing 2012
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Online Access:http://eprints.intimal.edu.my/184/1/24-ft.pdf
http://eprints.intimal.edu.my/184/
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Institution: INTI International University
Language: English
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Summary:A two-qubit system in quantum information theory is the simplest bipartite quantum system and its concurrence for pure and mixed states is well known. As a subset of two-qubit systems, Bell-diagonal states can be depicted by a very simple geometrical representation of a tetrahedron with sides of length 2 √ 2. Based on this geometric representation, we propose a simple approach to randomly generate four mixed Bell decomposable states in which the sum of their concurrence is equal to one.