AI 中文总结
本文提出一种量子比特态均参与的里德伯门框架，构造出可抵消或局部修正光移误差的协议，其性能优于常用的时间最优里德伯门，且证明了里德伯“飞越”纠缠门的存在，为中性原子量子计算提供重要基础。
AI 中文摘要
碱金属原子中由双光子跃迁驱动的里德伯纠缠门存在光移诱导误差的不利标度问题。在仅一个量子比特态耦合到里德伯态的常规里德伯门协议设计中，已知无法实现对此类失谐误差的鲁棒性。本文证明，在量子比特态均参与门操作的更通用框架中，可实现对此类误差的完全或部分鲁棒性。我们提出两种门构造，要么直接抵消误差，要么将其转化为可局部修正的单量子比特误差。我们绘制了光移强度、强度非均匀性及里德伯衰减率等参数范围内，这些协议优于广泛使用的时间最优里德伯门的区域，发现该区域已包含当前最先进实验的条件。最后，我们证明里德伯“飞越”纠缠门的存在，这是一类新兴中性原子量子计算架构的重要基础单元。
英文摘要
Rydberg entangling gates driven by a two-photon transition in alkali atoms suffer from an adverse scaling of light-shift-induced errors. Robustness to such detuning errors is known to be impossible to achieve in the design of conventional Rydberg gate protocols, where only one of the qubit states is coupled to the Rydberg state. Here, we show that in a more general framework, in which both qubit states take part in the gate, full or partial robustness to these errors can be realized. We present two gate constructions, which either cancel the errors outright or convert them into single-qubit errors that can be corrected locally. We map the regimes -- in terms of light-shift strength, intensity inhomogeneity, and Rydberg decay rate -- in which these protocols outperform the widely used time-optimal Rydberg gate, and find that they already include the conditions of state-of-the-art experiments. Finally, we show the existence of a Rydberg `fly-by' entangling gate, an important primitive for an emerging class of neutral-atom quantum computing architectures.
CommentsE.B. and G.N contributed equally to this work
