caa a22 4500 445865547 CHVBK 20180317145456.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1140/epjd/e2011-20195-y doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20195-y Dynamics of quantum discord for two correlated qubits in two independent reservoirs at finite temperature [Elektronische Daten] [L. Xu, J. Yuan, Q. Tan, L. Zhou, L. Kuang] We investigate dynamics of quantum discord (QD) for two initially-correlated qubits in two independent Ohmic reservoirs at finite temperature. It is indicated that the QD changes from a constant regime to a decaying regime when the two qubits are initially prepared in X-type quantum states. In the QD constant regime, the initial QD can be preserved despite decoherence in the system. It is found that temperature difference between two reservoirs significantly affects the preservation duration (PD) of the initial QD. We show that it is possible to enhance the preservation duration by properly choosing system parameters of the two qubits and reservoir parameters. Physically, it is found that the PD of the QD can reflect the temperature inhomogeneity of the non-equilibrium system which consists of the two qubits and their reservoirs. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Xu L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut Yuan J. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut Tan Q. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut Zhou L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut Kuang L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 565-571 1434-6060 64:2-3<565 2011 64 10053 https://doi.org/10.1140/epjd/e2011-20195-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20195-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut NATIONALLICENCE 700 1- Yuan J. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut NATIONALLICENCE 700 1- Tan Q. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut NATIONALLICENCE 700 1- Zhou L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut NATIONALLICENCE 700 1- Kuang L. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 565-571 1434-6060 64:2-3<565 2011 64 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer