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

作　　者：袁浩 韦联福 

机构地区：[1]Laboratory of Quantum Optoelectronics,School of Physics and Technology,Southwest Jiaotong University [2]State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics and Engineering,Sun Yat-Sen University

出　　处：《Chinese Physics B》2013年第5期118-123,共6页中国物理B（英文版）

基　　金：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);the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant Nos. SWJTU09CX078 and 2010XS47)

摘　　要：We investigate the dynamics of correlations for two-parameter qubit--qutrit states under various local decoherence channels including depalising, 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.We investigate the dynamics of correlations for two-parameter qubit--qutrit states under various local decoherence channels including depalising, 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 

分 类 号：O431.2[机械工程—光学工程]