Journal
PHYSICAL REVIEW A
Volume 80, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.044102
Keywords
correlation methods; information theory; quantum entanglement
Categories
Funding
- UFABC
- CAPES
- FAPESP
- CNPq
- Brazilian National Institute of Science and Technology for Quantum Information
- Royal Society
- Wolfson Trust
- Engineering and Physical Sciences Research Council (U. K.)
- National Research Foundation and Ministry of Education (Singapore)
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Recently some authors have pointed out that there exist nonclassical correlations which are more general, and possibly more fundamental, than entanglement. For these general quantum correlations and their classical counterparts, under the action of decoherence, we identify three general types of dynamics that include a peculiar sudden change in their decay rates. We show that, under suitable conditions, the classical correlation is unaffected by decoherence. Such dynamic behavior suggests an operational measure of both classical and quantum correlations that can be computed without any extremization procedure.
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