基于腔QED中实现多种量子克隆

Realization of the unified quantum cloning machine

在腔QED中,基于原子与腔场的相互作用,提出了一个通过控制原子与场相互作用的时间实现多种量子克隆的方案.例如,对于任意的输入量子态,可以实现普适的最优量子克隆;对于赤道输入量子态,通过参数调控,可以实现非对称性的1→2相位协变克隆和最优的非对称性的经济型的1→3相位协变克隆.在整个克隆过程中,由于原子与大失谐模式的腔场相互作用,所以该方案不受腔损和热场的影响.

Based on cavity QED, we first propose the unified scheme to implement the 1→2 optimal universal quantum cloning machine for arbitrary input state, the asymmetric 1→2 phase-covariant cloning and the 1→3 optimal asymmetric economical phase-covariant quantum cloning machine for the equatorial input state. During the cloning process, due to atoms interacting with a highly detuned cavity mode, thus the scheme is insensitive to the cavity decay and thermal field.