摘要
基于量子失谐(quantum discord)几何测量(简称GMQD)的方法求解了单变量X态的量子关联.在考虑环境的影响时,采用量子主方程求解出了一阶近似下该态在环境作用后的态.然后通过对比该态的纠缠度以及GMQD,可以发现GMQD具有比量子纠缠更优异的抗消相干性能.
Based on the method of geometric measure of quantum discord( GMQD), the paper obtains the quantum relation of the single-parameter X states. The evolved states influenced by environment are calcu- lated with the quantum master equation under one-order approximation. Through comparing the entangle- ment degree and GMQD of the evolved states, it comes to the conclusion that GMQD shows a stronger re- sistance to de-coherence than quantum entanglement.
出处
《南昌工程学院学报》
CAS
2013年第6期5-7,共3页
Journal of Nanchang Institute of Technology
基金
江西省教育厅科技项目(GJJ13748)
关键词
量子光学
X态
量子关联
几何测量
quantum optics
X states
quantum correlation
geometric measure