摘要
研究光与物质的相互作用并利用其性质设计新型的量子器件,以实现光信息存储及其消相干抑制.分析了以单色激光场为控制场的Λ型三能级原子系统的主方程模型,借助于无消相干子空间的构造方法,通过改变耦合激光场Rabi频率的方式,设计了实现系统中量子态相干保持的控制策略.
The interpretation to the mechanism of interaction of light and matter is used in new quantum devices designing for the optical information storage. For reducing the unexpected decoherence effect in a A-typed three-level atom system, the master equation of an atomic system is investigated to find a set of states that have zero spontaneous decay rates. Two laser fields are introduced to prepare the decoherence-free state by using decoherence-free subspace (DFS) strategy to suppress spontaneous emission for the decoupling of the system's state and the environment. Theoretical analysis verifys its effectiveness to coherence-preserving.
出处
《控制与决策》
EI
CSCD
北大核心
2009年第3期451-454,共4页
Control and Decision
基金
国家自然科学基金项目(60804020)
中国科学技术大学研究生创新基金项目(KD2006040)
关键词
三能级原子系统
量子调控
相干保持
相干控制
无消相干子空间
Three-level atom system, Manipulation of quantum system
Coherence-preserving
Coherent control
Decoherence-free subspace