论文标题
使用过渡量子驱动的中性原子中的两分门
Two-qubit gate in neutral atoms using transitionless quantum driving
论文作者
论文摘要
中性原子系统是实现基于门的量子计算的有前途的平台，因为它的能力可以捕获和控制不同几何形状中的几个原子码头，并且能够在量子器之间执行强，远程相互作用的能力；但是，两Q量的纠缠门忠诚度落后于竞争平台，例如超导系统和被困的离子。我们工作的目的是根据Rydberg-Blockade机制设计一个快速，健壮，高保真控制的Z（CZ）门，以用于中性原子。我们提出了一种依赖于使用宽带激光器同时和无过渡的量子驱动的栅极过程。通过模拟两个相互作用的纤维原子的系统，包括激发级别和参数波动的自发发射，我们在$ 0.12〜μ $ s的运行时间内产生了一个rydberg-blockade CZ门，富达0.9985。我们的栅极过程提供的CZ门比最先进的实验CZ门和基于原子绝热驾驶的模拟CZ门更优秀的CZ门。我们的结果表明，我们的栅极过程具有使用中性原子实现可扩展量子计算的巨大潜力。
A neutral-atom system serves as a promising platform for realizing gate-based quantum computing because of its capability to trap and control several atomic qubits in different geometries and the ability to perform strong, long-range interactions between qubits; however, the two-qubit entangling gate fidelity lags behind competing platforms such as superconducting systems and trapped ions. The aim of our work is to design a fast, robust, high-fidelity controlled-Z (CZ) gate, based on the Rydberg-blockade mechanism, for neutral atoms. We propose a gate procedure that relies on simultaneous and transitionless quantum driving of a pair of atoms using broadband lasers. By simulating a system of two interacting Caesium atoms, including spontaneous emission from excited levels and parameter fluctuations, we yield a Rydberg-blockade CZ gate with fidelity 0.9985 over an operation time of $0.12~μ$s. Our gate procedure delivers CZ gates that are superior than the state-of-the-art experimental CZ gate and the simulated CZ gates based on adiabatic driving of atoms. Our results show that our gate procedure carries significant potential for achieving scalable quantum computing using neutral atoms.
