Coherent interaction-free detection of microwave pulses with a superconducting circuit

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Journal Title
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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-12
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Degree programme
Language
en
Pages
9
1-9
Series
Nature Communications, Volume 13, issue 1
Abstract
The interaction-free measurement is a fundamental quantum effect whereby the presence of a photosensitive object is determined without irreversible photon absorption. Here we propose the concept of coherent interaction-free detection and demonstrate it experimentally using a three-level superconducting transmon circuit. In contrast to standard interaction-free measurement setups, where the dynamics involves a series of projection operations, our protocol employs a fully coherent evolution that results, surprisingly, in a higher probability of success. We show that it is possible to ascertain the presence of a microwave pulse resonant with the second transition of the transmon, while at the same time avoid exciting the device onto the third level. Experimentally, this is done by using a series of Ramsey microwave pulses coupled into the first transition and monitoring the ground-state population.
Description
Funding Information: We are grateful to Kirill Petrovnin, Aidar Sultanov, Andrey Lebedev, Sergey Danilin, and Miika Haataja for assistance with sample fabrication and measurements. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 862644 (FET-Open project QUARTET). We also acknowledge support from the Academy of Finland under the RADDESS programme (project 328193) and the Finnish Center of Excellence in Quantum Technology QTF (projects 312296, 336810), as well as from Business Finland QuTI (decision 41419/31/2020). This work used the experimental facilities of the Low Temperature Laboratory and Micronova of OtaNano research infrastructure. Funding Information: We are grateful to Kirill Petrovnin, Aidar Sultanov, Andrey Lebedev, Sergey Danilin, and Miika Haataja for assistance with sample fabrication and measurements. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 862644 (FET-Open project QUARTET). We also acknowledge support from the Academy of Finland under the RADDESS programme (project 328193) and the Finnish Center of Excellence in Quantum Technology QTF (projects 312296, 336810), as well as from Business Finland QuTI (decision 41419/31/2020). This work used the experimental facilities of the Low Temperature Laboratory and Micronova of OtaNano research infrastructure. | openaire: EC/H2020/862644/EU//QUARTET
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Citation
Dogra , S , McCord , J J & Paraoanu , G S 2022 , ' Coherent interaction-free detection of microwave pulses with a superconducting circuit ' , Nature Communications , vol. 13 , no. 1 , 7528 , pp. 1-9 . https://doi.org/10.1038/s41467-022-35049-z