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

被引：3
|
作者：
Yang, Yang [1 ]
Wang, An-Min [2 ]
Cao, Lian-Zhen [1 ]
Zhao, Jia-Qiang [1 ]
Lu, Huai-Xin [1 ]
机构：
[1] Weifang Univ, Dept Phys & Optoelect Engn, Shandong Prov Key Lab Multiphoton Entanglement &, Weifang 261061, Peoples R China
[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2018年 / 35卷 / 08期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1088/0256-307X/35/8/080301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 cases the freezing phenomenon of coherence can be found.
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页数：4
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