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Abstract:
The information-theoretic definition of quantum correlation, e.g., quantum discord, is measurement dependent. By considering the more general quantum measurements, weak measurements, which include the projective measurement as a limiting case, we show that while weak measurements can enable one to capture more quantumness of correlation in a state, it can also induce other counterintuitive quantum effects. Specifically, we show that the general measurements with different strengths can impose different orderings for quantum correlations of some states. It can also modify the monogamous character for certain classes of states as well which may diminish the usefulness of quantum correlation as a resource in some protocols. In this sense, we say that the weak measurements play a dual role in defining quantum correlation.
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INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
ISSN: 0020-7748
Year: 2015
Issue: 1
Volume: 54
Page: 62-71
1 . 0 4 1
JCR@2015
1 . 7 0 8
JCR@2020
ESI Discipline: PHYSICS;
ESI HC Threshold:157
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 6
SCOPUS Cited Count: 7
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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