Shen Cai-Peng, Wu Jin-Lei, Su Shi-Lei, Liang Erjun
Opt Lett. 2019 Apr 15;44(8):2036-2039. doi: 10.1364/OL.44.002036.
One scheme is presented to construct the robust multi-qubit arbitrary-phase controlled-phase gate (CPG) with one control and multiple target qubits in Rydberg atoms using the Lewis-Riesenfeld (LR) invariant method. The scheme is not limited by adiabatic condition while preserves the robustness against control parameter variations of adiabatic evolution. Comparing with the adiabatic case, our scheme does not require very strong Rydberg interaction strength. Taking the construction of two-qubit π CPG as an example, our scheme is more robust against control parameter variations than non-adiabatic scheme and faster than adiabatic scheme.
提出了一种利用刘易斯-里森费尔德（LR）不变量方法在里德堡原子中构建具有一个控制量子比特和多个目标量子比特的鲁棒多量子比特任意相位控制相位门（CPG）的方案。该方案不受绝热条件限制，同时保持了对绝热演化控制参数变化的鲁棒性。与绝热情况相比，我们的方案不需要非常强的里德堡相互作用强度。以双量子比特π CPG的构建为例，我们的方案比非绝热方案对控制参数变化更鲁棒，比绝热方案更快。
