Dynamics of quantum correlation for a qubit–qutrit system in the presence of the dephasing environments
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We analytically study the dynamic behaviors of quantum correlation measured by three kinds of measures including quantum discord (QD), geometric quantum discord (GQD) and one-norm GQD for a qubit–qutrit system under the influence of dephasing environments with Ohmic-like spectral densities at nonzero temperature. It is shown that the similar evolution behaviors may be obtained for sub-Ohmic and Ohmic reservoirs. By properly choosing the system’s initial states and reservoir temperature, quantum correlation can take on some interesting results, such as the frozen and double sudden transition as well as the “revival” phenomenon, etc. Meanwhile, the remarkable similarities and differences among these correlation measures are also analyzed in detail and some significant results are presented. Our results provide some important information for the application of quantum correlation in hybrid qubit–qutrit systems in quantum information.
KeywordsQuantum correlation Dynamics Dephasing environments
We thank to Shun-Long Luo and Shuang-Shuang Fu for useful discussion on one-norm GQD. This work was supported by the Natural Science Foundation of China under Grants Nos. 11171249, 11105087, 61275210, 11275118, 11404198 , Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(STIP) under Grant No. 011152901012, International Cooperation Project of Shanxi Province under Grants No. 2014081027-2, and Youth Foundation of Taiyuan University of Technology under Grants No. 2014QN024.
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