Quantum properties and dynamics of X states

X states are a broad class of two-qubit density matrices that generalize many states of interest in the literature. In this work, we give a comprehensive account of various quantum properties of these states, such as entanglement, negativity, quantum discord and other related quantities. Moreover, w...

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Bibliographic Details
Published in:Journal of modern optics 2012-09, Vol.59 (15), p.1322-1329
Main Authors: Quesada, Nicolás, Al-Qasimi, Asma, James, Daniel F.V.
Format: Article
Language:English
Subjects:
Density
Dynamic mechanical properties
Dynamics
Evolution
Mathematical analysis
Matrices
Optical properties
Optics
Preserves
quantum correlations
quantum dynamics
Quantum theory
Transformations
X states
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Summary:X states are a broad class of two-qubit density matrices that generalize many states of interest in the literature. In this work, we give a comprehensive account of various quantum properties of these states, such as entanglement, negativity, quantum discord and other related quantities. Moreover, we discuss the transformations that preserve their structure both in terms of continuous time evolution and discrete quantum processes.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2012.713130