利用原子-腔场喇曼相互作用制备纠缠压缩真空态(英文)

Preparation of Entangled Squeezed Vacuum States via Atom-cavity-field Raman Interaction

提出了利用量子态腔场与原子的喇曼相互作用制备纠缠压缩真空态的方案 在该方案中 ,一个初始制备在基态的原子被依次送入几个初始制备在压缩真空态的微腔中 通过控制原子的运行速度 ,使原子与每一个腔具有相同的相互作用时间 当原子与腔场发生相互作用 ,原子与腔场产生纠缠之后 ,进行原子的测量 当原子被测量处于基态或激发态时 ,按照量子力学波包塌缩原理 ,腔场态将塌缩到相应的纠缠压缩真空态

A scheme for preparing bipartite and multipartite entangled squeezed vacuum states (SVSs) via the Raman interaction of an Λ-type three-level atom with squeezed vacuum states cavity fields is presented. In this scheme, an atom initially prepared in its ground state is in proper order injected into several cavities initially prepared each in the SVS with same interaction time. After the atom interacting with these cavities, the entanglement of atom-cavity-field is generated. Afterwards, by measuring the atom the cavity-field entangled SVSs are obtained.Also, the entanglement properties of bipartite entangled SVSs as well as multipartite entangled SVSs are discussed.