Hsu, H., Silveri, M., Gunyhó, A., Goetz, J., Catelani, G, Möttönen, M. (2020) Tunable refrigerator for nonlinear quantum electric circuits. Physical Review B, 101 (23), 235422. https://doi.org/10.1103/PhysRevB.101.235422
Tunable refrigerator for nonlinear quantum electric circuits
|Author:||Hsu, Hao1; Silveri, Matti2,3; Gunyhó, András2;|
1JARA Institute for Quantum Information (PGI-11), Forschungszentrum Jülich, 52425 Jülich, Germany
2QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland
3Research Unit of Nano and Molecular Systems, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
4IQM, Keilaranta 19, FI-02150 Espoo, Finland
5VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 VTT, Finland
|Online Access:||PDF Full Text (PDF, 1.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020070146575
American Physical Society,
|Publish Date:|| 2020-07-01
The emerging quantum technological applications call for fast and accurate initialization of the corresponding devices to low-entropy quantum states. To this end, we theoretically study a recently demonstrated quantum-circuit refrigerator in the case of nonlinear quantum electric circuits such as superconducting qubits. The maximum refrigeration rate of transmon and flux qubits is observed to be roughly an order of magnitude higher than that of usual linear resonators, increasing flexibility in the design. We find that for typical experimental parameters, the refrigerator is suitable for resetting different qubit types to fidelities above 99.99% in a few or a few tens of nanoseconds depending on the scenario. Thus the refrigerator appears to be a promising tool for quantum technology and for detailed studies of open quantum systems.
Physical review. B
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
114 Physical sciences
This research was financially supported by: European Research Council under Grant No. 681311 (QUESS) and Marie Skłodowska-Curie Grant No. 795159; Academy of Finland under its Centres of Excellence Program Grant No. 312300, and Grant Nos. 265675, 305237, 305306, 308161, 312300, 314302, 316551, 316619, 320086; Finnish Cultural Foundation; the Jane and Aatos Erkko Foundation; Vilho, Yrjö and Kalle Väisälä Foundation; the Emil Aaltonen Foundation; the Alfred Kordelin Foundation; the Technology Industries of Finland Centennial Foundation; and the Internationalization Fund - Cutting-Edge Ideas initiative of Forschungszentrum Jülich.
|Academy of Finland Grant Number:||
316619 (Academy of Finland Funding decision)
320086 (Academy of Finland Funding decision)
© 2020 American Physical Society. Published in this repository with the kind permission of the publisher.