利用腔QED实现量子态的转移

利用多个相同的两能级原子在一个强经典场驱动下同时和一个单模腔场发生相互作用模型,给出了如何实现一个量子比特的原子态的远距离转移、原子纠缠态转移的方案.该方案中的腔场处于虚激发状态,原子和腔场之间没有能量交换.因此所提出的态转移方案不受腔场热光子和腔衰减的影响,对腔的Q值要求大大降低,使实验实现成为可能.

Transfer of an Unknown Quantum State Via Cavity QED

A scheme for the distant transfer of a qubit atomic state and atomic entangled states are presented.In the scheme,the identical two-level atoms interact simultaneously with a highly detuned cavity mode and are driven by a strong classical field,and the atomic state evolution is independent of cavity field state.Thus the scheme is insensitive to both the cavity decay and the thermal field and the requirement on the quality factor of the cavity is greatly loosened, which is of importance from the experimental point of view.