Mid-Circuit Cavity Measurement in a Neutral Atom Array

Deist, Emma, Lu, Yue-Hui, Ho, Jacquelyn, Pasha, Mary Kate, et al. · 2022 · Physical Review Letters

| 编号 NA146 | 主题 实验架构与容错 | DOI 10.1103/physrevlett.129.203602 |

摘要

摘要保留原文（英文）

摘要取自 arXiv / 出版方元数据，未作翻译，以保证与原文一致。

2022 · Physical Review Letters Subsystem readout during a quantum process, or mid-circuit measurement, is crucial for error correction in quantum computation, simulation, and metrology. Ideal mid-circuit measurement should be faster than the decoherence of the system, high-fidelity, and nondestructive to the unmeasured qubits. Here, we use a strongly coupled optical cavity to read out the state of a single tweezer-trapped 87Rb atom within a small tweezer array. Measuring either atomic fluorescence or the transmission of light through the cavity, we detect both the presence and the state of an atom in the tweezer, within only tens of microseconds, with state preparation and measurement infidelities of roughly 0.5% and atom loss probabilities of around 1%. Using a two-tweezer system, we find measurement on one atom within the cavity causes no observable hyperfine-state decoherence on a second atom located tens of microns from the cavity volume. This high-fidelity mid-circuit readout method is a substantial step towards quantum error correction in neutral atom arrays.

全文共 6 页；文本提取件位于 .extracted/papers/NA146.txt（不随站点发布）。

本站词条在引用该文献时，会以 wikilink（sources/NA146）链接到本页；右侧「反向链接」面板自动列出所有引用它的词条。