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Título

The geometric approach to quantum correlations: Computability versus reliability

AutorTufarelli, Tommaso; MacLean, Tom; Girolami, Davide; Vasile, Ruggero ; Adesso, Gerardo
Fecha de publicación2013
EditorInstitute of Physics Publishing
CitaciónJournal of Physics A: Mathematical and Theoretical 46(27): 275308 (2013)
ResumenWe propose a modified metric based on the Hilbert-Schmidt norm and adopt it to define a rescaled version of the geometric measure of quantum discord. Such a measure is found not to suffer from pathological dependence on state purity. Although the employed metric is still non-contractive under quantum operations, we show that the resulting indicator of quantum correlations is in agreement with other bona fide discord measures in a number of physical examples. We present a critical assessment of the requirements of reliability versus computability when approaching the task of quantifying, or measuring, general quantum correlations in a bipartite state. © 2013 IOP Publishing Ltd.
DescripciónarXiv:1301.3526
Versión del editorhttp://dx.doi.org/10.1088/1751-8113/46/27/275308
URIhttp://hdl.handle.net/10261/116609
DOI10.1088/1751-8113/46/27/275308
Identificadoresdoi: 10.1088/1751-8113/46/27/275308
issn: 1751-8113
e-issn: 1751-8121
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