Projects per year
Abstract
The Lamb shift, an energy shift arising from the presence of the electromagnetic vacuum, has been observed in various quantum systems and established as part of the energy shift independent of the environmental photon number. However, typical studies are based on simplistic bosonic models which may be challenged in practical quantum devices. We demonstrate a hybrid bosonic-fermionic environment for a linear resonator mode and observe that the photon number in the environment can dramatically increase both the dissipation and the effective Lamb shift of the mode. Our observations are quantitatively described by a first-principles model, which we develop here also to guide device design for future quantum-technological applications. The device demonstrated here can be utilized as a fully rf-operated quantum-circuit refrigerator to quickly reset superconducting qubits.
Original language | English |
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Article number | 033126 |
Number of pages | 14 |
Journal | PHYSICAL REVIEW RESEARCH |
Volume | 3 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sep 2021 |
MoE publication type | A1 Journal article-refereed |
Keywords
- QUANTUM SUPREMACY
- VACUUM
- CIRCUIT
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Dive into the research topics of 'Photon-number-dependent effective Lamb shift'. Together they form a unique fingerprint.Datasets
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Data for Photon-number-dependent Lamb shift
Viitanen, A. (Creator), Silveri, M. (Creator), Jenei, M. (Creator), Sevriuk, V. (Creator), Tan, K. (Creator), Partanen, M. (Creator), Goetz, J. (Creator), Grönberg, L. (Creator), Lahtinen, V. (Creator) & Möttönen, M. (Creator), 22 Oct 2020
Dataset
Projects
- 8 Finished
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CRYOMET: Fast Cryogenic Microwave Photon Power Metrology in Superconducting Quantum Circuits (CRYOMET)
Tan, K., Gunyho, A., Rasola, M., Zamora Zamora, R., Santos Teixeira, W. & Sevriuk, V.
01/09/2018 → 31/08/2022
Project: Academy of Finland: Other research funding
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NEQC: Noise-Enhanced Quantum Control
Goetz, J.
01/04/2018 → 31/03/2020
Project: EU: Framework programmes funding
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Finnish Centre of Excellence in Quantum Technology
Möttönen, M., Hazra, D., Heinsoo, J., Ollikainen, T., Mäkinen, A., Tuorila, J. & Sevriuk, V.
01/01/2018 → 31/12/2019
Project: Academy of Finland: Other research funding