利用选择共振作用实现相位门

Implementing Phase Gate Via Selective Resonant Interaction

提出一个在高品质腔中实现相位门方案.该方案通过控制原子和腔之间的相互作用,选择所需要的共振作用,而让其它的原子跃迁由于大失谐可以绝热去除.由于仅原子基态参与作用,该方案有效抑制了原子自发辐射的影响;同时,不需要对腔中原子独立寻址,进一步降低了实验难度.

A scheme is presented to implement phase gate in a high-Q optical cavity. In the scheme, the atom-field interaction is controlled highly to yield a resonant interaction inside one selected atom-field subspace and leave the others in large detuning, which can be eliminated adiabatically. The atomic spontaneous emission is suppressed effectively since atomic ground state is only involved, and needlessness for addressing individually the atoms inside the cavity further lowers the difficulties of experiment.