arXiv:0902.3729 [quant-ph]AbstractReferencesReviewsResources
Uncertainty relation of mixed states by means of Wigner-Yanase-Dyson information
D. Li, X. Li, F. Wang, X. Li, H. Huang, L. C. Kwek
Published 2009-02-21Version 1
The variance of an observable in a quantum state is usually used to describe Heisenberg uncertainty relation. For mixed states, the variance includes quantum uncertainty and classical uncertainty. By means of the skew information and the decomposition of the variance, a stronger uncertainty relation was presented by Luo in [Phys. Rev. A 72, 042110 (2005)]. In this paper, by using Wigner-Yanase-Dyson information which is a generalization of the skew information, we propose a general uncertainty relation of mixed states.
Comments: 7 pages, no figures, submitted to PRA
Journal: Phys. Rev. A. 79, 052106 (2009)
Categories: quant-ph
Subjects: 03.65.Ta
Keywords: mixed states, wigner-yanase-dyson information, skew information, general uncertainty relation, stronger uncertainty relation
Tags: journal article
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