论文标题

本地Qudit纠缠在一个被困的离子量子处理器中

Native qudit entanglement in a trapped ion quantum processor

论文作者

Hrmo, Pavel, Wilhelm, Benjamin, Gerster, Lukas, van Mourik, Martin W., Huber, Marcus, Blatt, Rainer, Schindler, Philipp, Monz, Thomas, Ringbauer, Martin

论文摘要

量子信息载体就像大多数物理系统一样,自然占据了高维的希尔伯特空间。这些高维(QUDIT)量子系统并没有将它们限制为两级子空间,而是成为下一代量子处理器的强大资源。然而,利用这些系统的潜力需要有效的方法来产生它们之间的相互作用。在这里,我们在实验上证明了在被困的离子Qudit系统中实现的本机两级纠缠门,直至尺寸$ 5 $。这是通过概括最近提出的轻换门机制来实现的,以在门的单个应用中生成真正的Qudit纠缠。栅极无缝地适应系统的局部维度,其校准开销与尺寸无关。

Quantum information carriers, just like most physical systems, naturally occupy high-dimensional Hilbert spaces. Instead of restricting them to a two-level subspace, these high-dimensional (qudit) quantum systems are emerging as a powerful resource for the next generation of quantum processors. Yet harnessing the potential of these systems requires efficient ways of generating the desired interaction between them. Here, we experimentally demonstrate an implementation of a native two-qudit entangling gate in a trapped-ion qudit system up to dimension $5$. This is achieved by generalizing a recently proposed light-shift gate mechanism to generate genuine qudit entanglement in a single application of the gate. The gate seamlessly adapts to the local dimension of the system with a calibration overhead that is independent of the dimension.

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