论文标题
超电原子中的完全单一QUTRIT控制
Complete unitary qutrit control in ultracold atoms
论文作者
论文摘要
物理量子系统通常由两个以上的级别组成，并提供了在Qubit以外的高维空间中编码信息的能力，从三级QUTRIT开始。在这里，我们在Ultracold $^{87} $ rb的合奏中编码中性原子Qutrits，并演示任意的单Qutrit SU（3）门。我们仅使用两种谐振微波色调生成一套完整的门，包括合成一个栅极，该门在三级$λ$ -Scheme中两个断开连接级别之间的直接耦合。使用两个不同的门集，我们实现并表征Walsh-Hadamard傅立叶变换，并从两种方法中找到相似的最终状态保真度和纯度。这项工作确立了超级中性原子QUTRIT，作为基于QUTRIT的量子信息处理的有前途的平台，扩展到$ d $维数的Qudits以及具有非平凡几何相的多级量子状态操作中的探索。
Physical quantum systems are commonly composed of more than two levels and offer the capacity to encode information in higher-dimensional spaces beyond the qubit, starting with the three-level qutrit. Here, we encode neutral-atom qutrits in an ensemble of ultracold $^{87}$Rb and demonstrate arbitrary single-qutrit SU(3) gates. We generate a full set of gates using only two resonant microwave tones, including synthesizing a gate that effects a direct coupling between the two disconnected levels in the three-level $Λ$-scheme. Using two different gate sets, we implement and characterize the Walsh-Hadamard Fourier transform, and find similar final-state fidelity and purity from both approaches. This work establishes the ultracold neutral-atom qutrit as a promising platform for qutrit-based quantum information processing, extensions to $d$-dimensional qudits, and explorations in multilevel quantum state manipulations with nontrivial geometric phases.
