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

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

中国物理B ›› 2013, Vol. 22 ›› Issue (5): 50303-050303.doi: 10.1088/1674-1056/22/5/050303

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

袁浩^a, 韦联福^{a b}

a Laboratory of Quantum Optoelectronics, School of Physics and Technology, Southwest Jiaotong University, Chengdu 610031, China;
b State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China

收稿日期:2012-07-26 修回日期:2012-10-26 出版日期:2013-04-01 发布日期:2013-04-01
基金资助:
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).

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

Yuan Hao (袁浩)^a, Wei Lian-Fu (韦联福)^{a b}

a Laboratory of Quantum Optoelectronics, School of Physics and Technology, Southwest Jiaotong University, Chengdu 610031, China;
b State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China

Received:2012-07-26 Revised:2012-10-26 Online:2013-04-01 Published:2013-04-01
Contact: Wei Lian-Fu E-mail:weilianfu@gmail.com
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: classical correlations, measurement-induced disturbance, qubit-qutrit states, decoherence

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.

Key words: classical correlations, measurement-induced disturbance, qubit-qutrit states, decoherence

中图分类号: (Decoherence; open systems; quantum statistical methods)

03.65.Yz

03.67.Mn (Entanglement measures, witnesses, and other characterizations)

袁浩, 韦联福. Correlation dynamics of two-parameter qubit-qutrit states under decoherence[J]. 中国物理B, 2013, 22(5): 50303-050303.

Yuan Hao (袁浩), Wei Lian-Fu (韦联福). Correlation dynamics of two-parameter qubit-qutrit states under decoherence[J]. Chin. Phys. B, 2013, 22(5): 50303-050303.

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

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

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