中性原子阵列中三量子比特CCZ门的有限阻塞动力学
Finite-blockade dynamics of a three-qubit ccz gate in neutral-atom arrays
- Indian Institute of Technology Roorkee（印度理工学院鲁尔基分校）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
本文理论研究了对称三中性原子系统中有限阻塞对三量子比特CCZ门的影响，通过对称性适配哈密顿量分析门动力学，识别出高保真、快速且低泄漏的最优工作区域，并量化了主要误差机制，为多量子比特量子计算提供了实用指南。
中文摘要 AI 辅助
我们提出了对称三中性原子系统中有限阻塞动力学的理论研究，为理解高保真多量子比特量子操作提供了一个框架。系统地研究了从有限阻塞到强阻塞区域的转变，以考察有限里德伯阻塞效应。利用单个高斯激光脉冲，我们分析了完整的门动力学，同时明确考虑了粒子向非计算里德伯态的泄漏。通过利用系统的置换对称性，我们构建了一个对称性适配的哈密顿量，在保持精确动力学的同时降低了计算复杂度。这使得我们能够系统地研究拉比频率、激光失谐和里德伯阻塞强度之间的相互作用，从而识别出具有高保真度、快速门操作和抑制泄漏的最优工作区域。我们进一步量化了主要的误差机制，包括相位误差、粒子泄漏和有限里德伯态寿命，并评估了它们对门保真度的影响。我们的结果展示了实验上可达到的高保真门操作，并为多量子比特量子计算提供了实用指南。
英文摘要
We present a theoretical study of finite-blockade dynamics in a symmetric three-neutral-atom system, providing a framework for understanding high-fidelity multiqubit quantum operations. The transition from the finite- to the strong-blockade regime is systematically investigated to examine the effects of finite Rydberg blockade. Using a single Gaussian laser pulse, we analyze the complete gate dynamics while explicitly accounting for population leakage into non-computational Rydberg states. By exploiting the permutation symmetry of the system, we construct a symmetry-adapted Hamiltonian that reduces the computational complexity while preserving the exact dynamics. This enables a systematic investigation of the interplay among the Rabi frequency, laser detuning, and Rydberg blockade strength, leading to the identification of optimal operating regimes with high fidelity, fast gate operation, and suppressed leakage. We further quantify the dominant error mechanisms, including phase errors, population leakage, and finite Rydberg-state lifetimes, and evaluate their impact on the gate fidelity. Our results demonstrate experimentally accessible high-fidelity gate operation and provide practical guidelines for multi-qubit quantum computing.
