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Basis entropy: A useful physical quantity about projective measurement
June 05, 2016 Β· Declared Dead Β· π arXiv.org
"No code URL or promise found in abstract"
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Authors
Xing Chen
arXiv ID
1606.01505
Category
quant-ph: Quantum Computing
Cross-listed
cs.IT
Citations
0
Venue
arXiv.org
Last Checked
5 months ago
Abstract
Projective measurement can increase the entropy of a state $Ο$, the increased entropy is not only up to the basis of projective measurement, but also has something to do with the properties of the state itself. In this paper we define this increased entropy as basis entropy. And then we discuss the usefulness of this new concept by showing its application in deciding whether a state is pure or not and detecting the existence of quantum discord. And as shown in the paper, this new concept can also be used to describe decoherence.
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