利用双面腔制备n原子GHZ态

提出了一种利用双面腔制备多原子GHZ态的方法.当腔中囚禁原子处于特定态时,腔可能反射入射的单光子脉冲,也可能透射它.这个特性可以引起囚禁原子和输入腔肠的纠缠.数值模拟显示制备的多原子GHZ态具有很高的保真度和成功率.而且原子自发辐射等内禀噪声只对成功率有影响,而对保真度几乎没有影响.另外,对高Q腔和原子的L-D条件的不要求,提升了试验实现的可行性.

Generation of n-Atom GHZ State via Two-sided Cavity QED

The scheme was proposed to generate multiple-atom GHZ state via the state-of-the-art two-sided cavities. A single-photon pulse could not only be reflected but also be transmitted through the two-sided cavity with a single trapped atom, which is in certain state. Entanglement between the trapped atom and the input field was resulted in this property. The numerical simulations showed that the produced multiple- particle GHZ state had high fidelity and success probability. The intrinsic noise, such as the atomic spontaneous emission, only led to the error probability and had no influence on the fidelity. In addition, the high-Q cavity and the Lamb-Dicke condition of atom were not required, which expanded the possibility of experimental realization.