In this paper, we propose a scheme to generate a Fredkin gate in a single step based on path engineering. The quantum Zeno dynamics is utilized to simplify the Hamiltonian. As a result, an effective Hamiltonian will be obtained to drive the system to evolve into the target state in a short time if reasonable parameters are set. In addition, the results of explicit numerical simulations indicate that the scheme is robust against the instability of experimental parameters and the decoherence arising from atomic spontaneous emission and cavity decay. Most importantly, our scheme is just a single step, which greatly simplifies actual operation.

中文翻译：

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基于路径工程的鲁棒弗雷德金门的一步式实现

在本文中，我们提出了一种基于路径工程在单个步骤中生成Fredkin门的方案。量子芝诺动力学用于简化哈密顿量。结果，如果设置了合理的参数，将获得有效的哈密顿量，以驱动系统在短时间内演变为目标状态。另外，显式数值模拟的结果表明该方案对于实验参数的不稳定性以及原子自发发射和腔衰变引起的退相干具有鲁棒性。最重要的是，我们的方案仅一步之遥，极大地简化了实际操作。