Correlation dynamics of two-parameter qubit-qutrit states under decoherence

doi:10.1088/1674-1056/22/5/050303

Abstract We investigate the dynamics of correlations for two-parameter qubit-qutrit states under various local decoherence channels including depahsing, phase-flip, bit- and trit-flip, bit- and trit-phase-flip, and depolarizing channels. We find that, under certain conditions, the classical correlations may not be affected by the noise or decay monotonically. The quantum correlations measured by measurement-induced disturbance (MID) show three types of dynamical behaviors: (i) monotonic decay to zero, (ii) monotonic decay to a nonzero steady value, (iii) increase from zero and then decrease to zero in a monotonic way. Consequently, we find that, differing from the dynamics of entanglement, the present classical and quantum correlations do not reveal sudden death behavior.

Keywords: classical correlations measurement-induced disturbance qubit-qutrit states decoherence

Received: 26 July 2012
Revised: 26 October 2012
Accepted manuscript online:

PACS:	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 90921010 and 11174373), the National Basic Research Program of China (Grant No. 2010CB923104), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant Nos. SWJTU09CX078 and 2010XS47).

Corresponding Authors: Wei Lian-Fu
E-mail: weilianfu@gmail.com

Cite this article:

Yuan Hao (袁浩), Wei Lian-Fu (韦联福) Correlation dynamics of two-parameter qubit-qutrit states under decoherence 2013 Chin. Phys. B 22 050303

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Correlation dynamics of two-parameter qubit-qutrit states under decoherence

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