,Frozen Quantum Coherence for a Central Two-Qubit System in a Spin-Chain Environment

• 作 者: Yang Yang An-Min Wang Lian-Zhen Cao Jia-Qiang Zhao Huai-Xin Lu
• 机 构: Shandong Provincial Key Laboratory of Multi-Photon Entanglement and Manipulation,Department of Physi
• 出 处: 中国物理快报（英文版）
• 发表日期: 2018年8期

We investigate the dynamics of coherence for a central two-qubit system coupled to an XY spin chain with the Dzyaloshinsky-Moriya interaction.It is found that a sudden transition of coherence exists near the critical point in the weak-coupling case,and an oscillatory envelope appears in the strong-coupling case.In both causes the freezing phenomenon of coherence can be found.