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arXiv 2402.09314cond-mat.mes-hallquant-ph
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Josephson辐射的热辐射测量探测

Bolometric detection of Josephson radiation

Bayan Karimi, Gorm Ole Steffensen, Andrew P. Higginbotham, Charles M. Marcus, Alfredo Levy Yeyati, Jukka P. Pekola

AI总结:

本研究设计并构建了片上测辐射热计,在非平衡条件下探测Josephson辐射,将高达约100GHz的交流电流转化为直流温升,为微波光子探测和Josephson动力学研究提供了高效宽带的新方案。

摘要:

自1960年代以来,Josephson结(JJ)一直受到深入研究。然而,即使在当今基于大量JJ构建量子信息处理设备的时代,关于单个结的开放性问题仍未解决,例如量子相变、JJ与环境的耦合以及提高超导量子比特的相干性。在此,我们设计并构建了一个工程化的片上库,它作为一个高效的测辐射热计,用于探测非平衡(偏置)条件下的Josephson辐射。该测辐射热计将频率高达约$100\,$GHz的微波频段交流Josephson电流转换为可测量的直流温升。本实验展示了一种高效、宽带的微波光子热探测方案,并提供了一种超越标准电导测量的Josephson动力学敏感探测器。利用电路模型,我们定量地捕捉了电流-电压特性和测得的功率。

英文摘要:

A Josephson junction (JJ) has been under intensive study ever since 1960's. Yet even in the present era of building quantum information processing devices based on many JJs, open questions regarding a single junction remain unsolved, such as quantum phase transitions, coupling of the JJ to an environment and improving coherence of a superconducting qubit. Here we design and build an engineered on-chip reservoir that acts as an efficient bolometer for detecting the Josephson radiation under non-equilibrium (biased) conditions. The bolometer converts ac Josephson current at microwave frequencies, up to about $100\,$GHz, into a measurable dc temperature rise. The present experiment demonstrates an efficient, wide-band, thermal detection scheme of microwave photons and provides a sensitive detector of Josephson dynamics beyond the standard conductance measurements. Using a circuit model, we capture both the current-voltage characteristics and the measured power quantitatively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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