摘要
利用量子信息学的观点,分析了多个"任意多模(q模)相干态光场与二能级原子发生依赖于强度的任意多光子(N_k光子)非共振相互作用"构成的联合系统。结果发现:只需控制相互作用的时间:gt=π/2,无论初始存储于腔场还是原子中的量子纠缠信息均得以完全保持。当q=1,N_k=1时,将过渡到本文作者已讨论过的单模单光子相互作用的特殊情形,其结果是,量子信息完全交换。
The united system is analyzed by using of the viewpoint of quantum informatics. The system consists of many sub - system of multi - photon（ Nk photons） far - off resonant interaction of intensity - dependent coupling of two - level atoms with multi - mode （q modes） coherent state light field. It is found that initial quantum entangled information in the cavities or atoms can be completely preserved under only controlling the time （ gt =/2 ） of the interaction of atoms with cavity fields. When q = 1 and Nk = 1, the results obtained will fit the special situation of single - mode single - photon interaction, which the author of this paper have studied recently. The quantum entangled information completely swapped under the simple condition.
出处
《激光杂志》
CAS
CSCD
北大核心
2007年第6期22-23,共2页
Laser Journal
基金
陕西省自然科学基金项目(2004A19
2001SL04)
陕西省科技攻关项目(2002K05-G9)
渭南师院重点科研基金项目(06YKF012)
关键词
量子信息学
量子纠缠
失谐
信息
保持
quantum informatics
quantum entanglement
detuning
information
preservation.
