受之前有关控制量子门工作的启发，提出了一个在腔QED中实现CNOT门、Toffoli门以及Fredkin门的简易方案。本方案只涉及到原子与腔场之间的大失谐相互作用， 腔场处于虚激发，量子信息不会在原子和腔之间传递，因此对腔场的品质因子要求大大降低，在目前的实验技术条件下，该方案是可行的。

Inspired by the previous works on the conditional quantum logic gate, a scheme for realizing the C-NOT gate, Toffoli gate and Fredkin gate in cavity QED is proposed. The scheme only involves large-detuning atom-field interaction, so it is very simple and easy to be realized because the cavity is only virtually excited, and transfer of the quantum information between the atoms and cavity will not occur. Thus, it is insensitive to the cavity decay and the thermal field, and the requirement on quality factor of the cavities is greatly loosened and the scheme is feasible with present experimental technology.