基于光纤连接三个光腔制备三原子W态(英文)

Generation of W State of Three Two-level Atoms by Connecting Three Cavities Via Optical Fibers

提出一种基于两光纤连接三个光腔制备三原子W态的方案。在此方案中,腔场的信息可以通过光纤进行传送,利用集成在光纤上的两个法拉第回转器阻止来自第二个和第三个腔场的反射。制备得到三原子W态时腔场处于初始时的真空态。由于原子与腔场之间是共振作用,耦合强度相对较大,能缩短所需的相互作用时间。

A simple scheme is presented for generating three-atom W state by connecting three cavities via two opti- cal fibers. In the proposed protocol, the field state, which preserves the information about the first and the second atom, is transmitted from one cavity to the other along the fiber. Two Faraday rotator integrated in the fiber can be designed to completely stop the reflection from the fields of the second and the third cavity. We obtain the three-at- om W state leaving the cavity modes in their initial vacuum states. Because the interaction between the atoms and cavity field is resonant, the coupling strength can be relatively strong which will shorten the corresponding interac- tion time.