Through combining ‘Lewis–Riesenfeld invariants’ and ‘transitionless quantum driving’ with ‘quantum zeno subspace’ and ‘second-order perturbation approximation’, respectively, we put forward two different methods to construct shortcuts via nonadiabatic processes to present robust quantum phase gates in a two-atom system. The influence of various decoherence processes such as spontaneous emission and photon loss on the fidelity is discussed. The result shows that this scheme is insensitive to both the two error sources. Moreover, the interaction time of the scheme is very short and precise control is not required. Additionally, this scheme is not only implemented without requiring extra complex conditions, but is also insensitive to variations of the parameters. Therefore, this scheme may provide a new perspective for quantum computation.

通过将“刘易斯-里森菲尔德不变量”和“无跃迁量子驱动”分别与“量子芝诺子空间”和“二阶微扰近似”相结合，我们提出了两种不同的方法来通过非绝热过程构造捷径，从而在一个双原子系统。讨论了各种退相干过程，如自发发射和光子损失对保真度的影响。结果表明，该方案对两个误差源均不敏感。而且，该方案的交互时间非常短，不需要精确控制。此外，该方案不仅在不需要额外复杂条件的情况下实施，而且对参数的变化也不敏感。因此，该方案可能为量子计算提供一个新的视角。