article published yes Bayan Karimi author Gorm Ole Steffensen author Andrew P Higginbotham author 4AD6785A-F248-11E8-B48F-1D18A9856A870000-0003-2607-2363 Charles M. Marcus author Alfredo Levy Yeyati author Jukka P. Pekola author AnHi department Protected states of quantum matter project One of the most promising approaches towards large-scale quantum computation uses devices based on many Josephson junctions. Yet, even today, open questions regarding the single junction remain unsolved, such as the detailed understanding of the quantum phase transitions, the coupling of the Josephson junction to the environment or how to improve the coherence of a superconducting qubit. Here we design and build an engineered on-chip reservoir connected to a Josephson junction that acts as an efficient bolometer for detecting the Josephson radiation under non-equilibrium, that is, biased conditions. The bolometer converts the a.c. Josephson current at microwave frequencies up to about 100 GHz into a temperature rise measured by d.c. thermometry. A circuit model based on realistic parameter values captures both the current–voltage characteristics and the measured power quantitatively. 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. https://research-explorer.ista.ac.at/download/17480/18818/2024_NatureNanotechnology_Karimi.pdf application/pdfno Springer Nature2024 eng 1748-3387 1748-3395 2402.09314 00129652200000210.1038/s41565-024-01770-7 191613-1618 Karimi, Bayan, Gorm Ole Steffensen, Andrew P Higginbotham, Charles M. Marcus, Alfredo Levy Yeyati, and Jukka P. Pekola. “Bolometric Detection of Josephson Radiation.” <i>Nature Nanotechnology</i>. Springer Nature, 2024. <a href="https://doi.org/10.1038/s41565-024-01770-7">https://doi.org/10.1038/s41565-024-01770-7</a>. Karimi B, Steffensen GO, Higginbotham AP, Marcus CM, Levy Yeyati A, Pekola JP. Bolometric detection of Josephson radiation. <i>Nature Nanotechnology</i>. 2024;19:1613-1618. doi:<a href="https://doi.org/10.1038/s41565-024-01770-7">10.1038/s41565-024-01770-7</a> Karimi B, Steffensen GO, Higginbotham AP, Marcus CM, Levy Yeyati A, Pekola JP. 2024. Bolometric detection of Josephson radiation. Nature Nanotechnology. 19, 1613–1618. Karimi, B., Steffensen, G. O., Higginbotham, A. P., Marcus, C. M., Levy Yeyati, A., &#38; Pekola, J. P. (2024). Bolometric detection of Josephson radiation. <i>Nature Nanotechnology</i>. Springer Nature. <a href="https://doi.org/10.1038/s41565-024-01770-7">https://doi.org/10.1038/s41565-024-01770-7</a> B. Karimi, G. O. Steffensen, A. P. Higginbotham, C. M. Marcus, A. Levy Yeyati, and J. P. Pekola, “Bolometric detection of Josephson radiation,” <i>Nature Nanotechnology</i>, vol. 19. Springer Nature, pp. 1613–1618, 2024. B. Karimi, G.O. Steffensen, A.P. Higginbotham, C.M. Marcus, A. Levy Yeyati, J.P. Pekola, Nature Nanotechnology 19 (2024) 1613–1618. Karimi, Bayan, et al. “Bolometric Detection of Josephson Radiation.” <i>Nature Nanotechnology</i>, vol. 19, Springer Nature, 2024, pp. 1613–18, doi:<a href="https://doi.org/10.1038/s41565-024-01770-7">10.1038/s41565-024-01770-7</a>. 174802024-09-01T22:01:09Z2026-06-03T07:16:01Z