Projects per year
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.
Original language | English |
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Article number | 7528 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Nature Communications |
Volume | 13 |
Issue number | 1 |
DOIs | |
Publication status | Published - Dec 2022 |
MoE publication type | A1 Journal article-refereed |
Fingerprint
Dive into the research topics of 'Coherent interaction-free detection of microwave pulses with a superconducting circuit'. Together they form a unique fingerprint.Projects
- 4 Finished
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QuTI: Quantum Technologies Industrial
Paraoanu, G.-S. (Principal investigator), Khalifa, H. (Project Member), Dogra, S. (Project Member), Kuzmanovic, M. (Project Member), Petrovnin, K. (Project Member), Björkman, I. (Project Member) & Chang, Y.-H. (Project Member)
01/11/2021 → 31/10/2024
Project: Business Finland: Strategic centres for science, technology and innovation (SHOK)
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-: Quantum-Enhanced Detection
Paraoanu, G.-S. (Principal investigator), Björkman, I. (Project Member), Sultanov, A. (Project Member) & McCord, J. (Project Member)
01/01/2020 → 31/12/2022
Project: Academy of Finland: Other research funding
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QUARTET: Quantum readout techniques and technologies
Paraoanu, G.-S. (Principal investigator), Khalifa, H. (Project Member) & Petrovnin, K. (Project Member)
15/10/2019 → 30/04/2023
Project: EU: Framework programmes funding
Equipment
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OtaNano – Low Temperature Laboratory
Savin, A. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility
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Press/Media
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Researchers use quantum mechanics to see objects without looking at them
21/12/2022 → 09/03/2023
6 items of Media coverage
Press/Media: Media appearance
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Quantum mechanics makes it possible to see objects without looking at them
01/01/2023
1 item of Media coverage
Press/Media: Media appearance
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Using quantum mechanics to see objects without looking at them
22/12/2022
1 item of Media coverage
Press/Media: Media appearance