基于两原子同时和腔场共振作用制备两原子纠缠态的腔QED方案(英文)

Scheme for generation entanglement between atoms far apart via resonant interaction of two atoms with a cavity in cavity quantum electrodynamics

我们提出了一个将两个远离的原子制备成纠缠态的腔QED方案,该方案基于两个原子同时和一个腔场发生共振作用.在这个方案里,我们利用一个事先制备好的纠缠态将另外两个分离的原子制备成纠缠态.该方案仅包含两个原子和腔场的共振相互作用,不需要用腔场存储量子信息,并且原子和腔场作用时间极短.因此,我们的方案基于目前的腔QED技术是可以实现的.

We propose a scheme for generation entanglement between atoms far apart based on a single resonant interaction of two atoms with a cavity mode in cavity quantum electrodynamics. In our scheme, we make two discrete atoms being entangled using an atom-pair already entangled by some means. The scheme only requires a single resonant interaction of the atoms with a cavity mode and does not use the cavity mode as the memory. Thus the scheme is very simple and the interaction time is very short, which is important in view of decoherence. Therefore, the proposed scheme might be realizable with current cavity QED techniques.