CAJ | 학술논문

利用超算符的方法研究了在经典激光场驱动下,分别囚禁在两个独立腔中的两个二能级原子的纠缠动力学.结果表明:两原子纠缠与腔场相干态的初始值无关,并且在腔场耗散比较小的时候,经典光驱动场会加速两原子的纠缠突然死亡,在腔场耗散比较大的时候,经典驱动场可以保护原子纠缠免于突然死亡.这说明即便在"坏"腔中,也可以通过加经典驱动场来避免原子纠缠突然死亡.
이용초산부적방법연구료재경전격광장구동하,분별수금재량개독립강중적량개이능급원자적규전동역학.결과표명:량원자규전여강장상간태적초시치무관,병차재강장모산비교소적시후,경전광구동장회가속량원자적규전돌연사망,재강장모산비교대적시후,경전구동장가이보호원자규전면우돌연사망.저설명즉편재"배"강중,야가이통과가경전구동장래피면원자규전돌연사망.
The entanglement dynamics of two two-level atoms which are respectively trapped in two independent dissipative single-mode cavities and strongly driven by the classical fields is investigated analytically utilizing the super operator method.It is found that the entanglement is not related to the initial value of the cavity coherent states.The driving field enhances the entanglement sudden death for small dissipation of the cavity,while it protects the entanglement from sudden death for large dissipation in the presence of strong driving field.These results show that even in the bad cavity (with large decay rate),the entanglement can be free from sudden death with the assistance of classical driving field.