偶数个多原子Greenberger-Horne-Zerlinger态的制备

提出了一种制备偶数个多原子Greenberger-Horne-Zerlinger态的方案,它是基于原子-腔场相互作用.首先n个分离的腔初始时处于真空态,通过双光子转移,把n个腔制备成数态|2>和真空态|o>的缠结态.随后,与腔场发生共振相互作用的2n个等同的原子被分别送入n个腔,通过相互作用后,2n个原子处于GHZ态,而n个腔仍然处于真空态.

GENERATION OF EVEN-NUMBER-ATOMGREENBERGER-HORNE-ZERLINGER STATES

A scheme for generating even number atom Greenberger Horne Zerlinger(GHZ) state is presented.It is based on atom cavity field interaction,n separated cavities are all initially the vacuum states,the entanglement of these cavities is prepared by a two photon transition (as cascade if two off resonant dipole transitions).Subsequently,even number(2n) identical two level atoms,resonant with the cavities,are sent through the cavities,respectively.After interactions,the even number(2n) atoms are the GHZ states,while 2n cavities are left in the vacuum states.