Bolometric detection of Josephson radiation
arxiv(2024)
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
100GHz, 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.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要