Enhancing the sensitivity of single microwave photon detection with bandwidth tunability

• URL: http://arxiv.org/abs/2501.07354v1
• Date: Mon, 13 Jan 2025 14:21:29 GMT
• Title: Enhancing the sensitivity of single microwave photon detection with bandwidth tunability
• Authors: Louis Pallegoix, Jaime Travesedo, Alexandre S. May, Léo Balembois, Denis Vion, Patrice Bertet, Emmanuel Flurin,
• Abstract summary: We report on the characteristics of a microwave photon counter device based on a superconducting transmon qubit. A power sensitivity of $3 cdot 10-23 mathrmW/sqrtmathrmHz$ is reached.
• Score: 36.136619420474766
• License:
• Abstract: We report on the characteristics of a microwave photon counter device based on a superconducting transmon qubit. Its design is similar to [arXiv:2307.03614], with an additional bandwidth tuning circuit that allows optimizing the device efficiency and noise. Owing to this new feature and to improvements in device fabrication, a power sensitivity of $3 \cdot 10^{-23} \mathrm{W}/\sqrt{\mathrm{Hz}}$ is reached. We confirm the high performance of the device by measuring single spin microwave fluorescence.

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