Heralded high-efficiency entanglement concentration of cluster states for photon systems with linear optics via time-delay effect

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-21 DOI:10.1088/1612-202x/ad6e6a

Fang-Fang Du, Ling-Hui Li, Xue-Mei Ren, Ming Ma, Yang-Yang Wang, Wen-Yao Liu

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引用次数: 0

Abstract

Entanglement concentration stands as a pivotal technique to safeguard against degraded fidelity in long-distance quantum communication. In this manuscript, propose ultra-efficient entanglement concentration protocols (ECPs) tailored for less-entangled two-photon cluster states and four-photon cluster states with two unknown parameters, leveraging simple linear optical elements and acute single-photon detectors. Additionally, ancillary photons, post-selection techniques, or photon-number-resolving detectors are unnecessary for complete identification of the parity-check measurement. By coordinating auxiliary time degrees of freedom and implementing multiple recycling conditions, the success of two ECPs can be heralded by detection signatures without compromising the incident qubits, thereby allowing their efficiencies to be close to 0.75, in principle. The combination of heralded detection and basic linear optical elements renders our practical ECPs accessible for experimental exploration with current technology.

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通过时延效应预示线性光学光子系统簇态的高效纠缠集中

纠缠集中是防止远距离量子通信保真度下降的关键技术。在本手稿中，我们利用简单的线性光学元件和敏锐的单光子探测器，提出了为具有两个未知参数的少纠缠双光子簇态和四光子簇态量身定制的超高效纠缠集中协议（ECP）。此外，无需辅助光子、后选技术或光子数分辨探测器，即可完成奇偶校验测量的识别。通过协调辅助时间自由度和实施多重回收条件，两个 ECP 的成功可以通过探测信号来预示，而不会损害入射量子比特，从而使其效率原则上接近 0.75。预示性探测和基本线性光学元件的结合，使我们的实用 ECP 可以在现有技术条件下进行实验探索。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.