Enhancing the sensitivity of single-microwave-photon detection with bandwidth tunability
Year: 2025
Type: article
Abstract: We report on the characteristics of a microwave photon-counter device based on a superconducting transmon qubit. Its design is similar to that described by Balembois [], which achieved a sensitivity of 10 − 22 W / Hz , but with an additional bandwidth-tuning circuit that permits tuning the detection bandwidth over an order of magnitude to optimize the efficiency and noise level of the device. As a result of this feature and improvements in device fabrication, a power sensitivity of 3 × 10 − 23 W / Hz is reached. We confirm the high performance of the device by measuring single-spin microwave fluorescence.
Source: Physical Review Applied
DOI: 10.1103/dbqj-qld5
Authors: Louis Pallegoix, Jaime Travesedo, Alexandre S. May, Léo Balembois, Denis Vion, Patrice Bertet, Emmanuel Flurin
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4417267981