论文标题
多Qubit Toffoli大门和Rydberg原子的最佳几何形状
Multiqubit Toffoli gates and optimal geometry with Rydberg atoms
论文作者
论文摘要
由于其实现可扩展量子计算机的潜力，多Quibit Toffoli Gate位于量子信息处理的核心。在本文中，我们演示了一个多标志的封锁门，其原子在三维球体阵列中排列。通过进化算法优化球形表面上的控制量分布的方法，大大提高了栅极性能，从而导致增强的不对称Rydberg封锁。这种球体构型不仅会在任意控制目标对之间的偶极封底能量保存井，从而使不对称的阻塞误差保持在非常低的水平；但也表现出对空间位置变化的前所未有的鲁棒性，导致位置误差可忽略不计。考虑到固有错误和典型的实验参数，我们从数值上表明，C $ _6 $ not rydberg Gate可以以0.992的忠诚度创建，这仅受Rydberg State Decsays的限制。我们的协议可以打开一个用于实现多个多个多个中性数量的高维原子阵列的新平台。
Due to its potential for implementing a scalable quantum computer, multiqubit Toffoli gate lies in the heart of quantum information processing. In this article, we demonstrate a multiqubit blockade gate with atoms arranged in a three-dimension spheroidal array. The gate performance is greatly improved by the method of optimizing control-qubit distributions on the spherical surface via evolutionary algorithm, which leads to an enhanced asymmetric Rydberg blockade. This spheroidal configuration, not only arises a well preservation for the dipole blockade energy between arbitrary control-target pairs, which keeps the asymmetric blockade error at a very low level; but also manifests an unprecedented robustness to the spatial position variations, leading to a negligible position error. Taking account of intrinsic errors and with typical experimental parameters, we numerically show that a C$_6$NOT Rydberg gate can be created with a fidelity of 0.992 which is only limited by the Rydberg state decays.Our protocol opens up a new platform of higher-dimensional atomic arrays for achieving multiqubit neutral-atom quantum computation.
