一个传送原子纠缠态的新方案

本文提出一个通过原子和腔场相互作用传送未知原子纠缠态的新方案,并且成功概率为100%.在这个方案里,我们主要利用两个原子用来接受被传送的原子纠缠态以及一个双模腔作为量子通道.由于腔场的两个模具有不同的频率和正交极化,因此这两个模能够被区分,并且处于腔场的不同区域.原子和腔场通过J-C哈密顿量发生共振相互作用,当原子和其中一个模相互作用时,另外一个模不受影响.该方案既不需要贝尔态测量,也不需要任何操作重构纠缠初态.这个方案也可以推广到传送N个原子的纠缠态.

Scheme to transfer an atomic entangled state in cavity QED

We present a scheme for transferring an unknown atomic entangled state via atom-cavity field interaction.This proposal,which has success probability of unit,is mainly employing two atoms for receiving the teleported state,and a two-mode cavity as the quantum channel.The two modes of the cavity have different frequencies and polarizations.So the two modes are distinguished by their frequencies and their orthogonal polarizations,hence they occupy distinct regions in the cavity.The atom interacts resonantly with the mode of the cavity according to the Jaynes-Cummings Hamiltonian,and when interaction between the atom and one of the two modes takes place,the other mode remains unaffected.This scheme does not require Bell-state measurement and any operations to reconstruct the initial state.This scheme can also be extended to transfer entangled state of N-atom.