کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
850561 | 909287 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The effect and control on remaining the quantum correlation by the coupling symmetry between qubits and the bath The effect and control on remaining the quantum correlation by the coupling symmetry between qubits and the bath](/preview/png/850561.png)
We study the dynamic evolution of quantum correlation of two interacting coupled qubits system in non-Markov environment, and quantify the quantum correlation using concurrence and quantum discord. We find that although both of them are physical quantities which measure the system characteristics of the quantum correlations, the quantum discord is more robust than concurrence, since it can keep a positive value even when the ESD happens. The quantum correlation of quantum system not only depends on the initial state but also strongly depends on the coupling ways between qubits and environment. For the given initial state, by keeping the coupling between qubits and environment in completely symmetric, we can completely avoid the effect the decoherence influenced on the quantum correlation and effectively prolong the survival time of quantum discord and concurrence. We also find that the stronger the interaction between qubits is, the more conducive the death of the quantum correlation is resisted.
Journal: Optik - International Journal for Light and Electron Optics - Volume 124, Issue 21, November 2013, Pages 4750–4753