Bolometric detection of Josephson radiation
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866914679174987776 |
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| author | Karimi, Bayan Steffensen, Gorm Ole Higginbotham, Andrew P. Marcus, Charles M. Yeyati, Alfredo Levy Pekola, Jukka P. |
| author_facet | Karimi, Bayan Steffensen, Gorm Ole Higginbotham, Andrew P. Marcus, Charles M. Yeyati, Alfredo Levy Pekola, Jukka P. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_09314 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bolometric detection of Josephson radiation Karimi, Bayan Steffensen, Gorm Ole Higginbotham, Andrew P. Marcus, Charles M. Yeyati, Alfredo Levy Pekola, Jukka P. Mesoscale and Nanoscale Physics Quantum Physics 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. |
| title | Bolometric detection of Josephson radiation |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2402.09314 |