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Sudden Change of Quantum Discord in Qutrit-Qutrit System Under Depolarising Noise |
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| Authors: | Liang Qiu Gang Tang Xianqing Yang Zhipeng Xun Bin Ye Anmin Wang |
| Affiliation: | 1. Department of Physics, China University of Mining and Technology, Xuzhou, 221116, China 2. School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, 221116, China 3. Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China |
| Abstract: | The effects of decoherence on quantum discord of two-qutrit system under the influence of multilocal, collective and global depolarising noises are investigated. Sudden change of quantum discord with the decoherence parameter and the initial state parameter occurs for the qutrits being coupled to multilocal or global depolarising noises. On the other hand, decoherence cannot induce sudden change of quantum discord when the system is collectively coupled to the depolarising noise. In addition, the local unitary transformation can alter the region in which the phenomenon of sudden change exists. |
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