与 Ising 链耦合的中心双量子比特系统的量子关联*OA北大核心CSCDCSTPCD
Quantum correlation for a central two-qubit system coupled to Ising chain∗
通过对双量子比特系统分别独自与 Ising 链耦合情形下的关联问题的研究，推导出了量子失协和量子关联几何度量的演化规律。在弱耦合相互作用情况下 Ising 链的临界点附近，量子关联存在突变。此外本文发现在某段时间内的演化过程中几何量子关联度保持不变。
Studying quantum correlation dynamics of a central two-qubit system coupled to Ising chain model, we obtain that the evolution of quantum discord and geometric measure of quantum discord for the central atoms. We find that quantum correlation exists a sudden transition in the weak coupled interaction near the quantum critical point of Ising chain. Moreover, the evolution of geometric measure of quantum discord in invariant to some extent.
量子关联量子失协量子关联几何度量
quantum correlationquantum discordgeometric measure of quantum discord
《物理学报》 2013 (13)
量子操作远程和非局域实现与相关量子信息理论及应用研究
1-5,5
国家自然科学基金(批准号:10975125)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.10975125)
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