Bolometric detection of Josephson radiation
- URL: http://arxiv.org/abs/2402.09314v1
- Date: Wed, 14 Feb 2024 17:06:45 GMT
- Title: Bolometric detection of Josephson radiation
- Authors: Bayan Karimi, Gorm Ole Steffensen, Andrew P. Higginbotham, Charles M.
Marcus, Alfredo Levy Yeyati, Jukka P. Pekola
- Abstract summary: 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.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: 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.
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