Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B73: Superconducting Qubits: Design and device tools
11:30 AM–2:30 PM,
Monday, March 6, 2023
Room: Room 405
Sponsoring
Unit:
DQI
Chair: Alexander McDonald, Université de Sherbrooke
Abstract: B73.00005 : Loss estimation using Energy Participation Ratio in KQCircuits
12:18 PM–12:30 PM
Presenter:
Niko Savola
(IQM Quantum Computers)
Authors:
Niko Savola
(IQM Quantum Computers)
Alessandro Landra
(IQM Quantum Computers)
Jukka Räbinä
(IQM Quantum Computers)
Eelis Takala
(IQM Quantum Computers)
Janne Kotilahti
(IQM Quantum Computers)
David Janzso
(IQM Quantum Computers)
Pavel Smirnov
(IQM Quantum Computers)
Vladimir Milchakov
(IQM Quantum Computers)
Kristinn Juliusson
(IQM Quantum Computers)
Sinan Inel
(IQM Quantum Computers)
Máté Jenei
(IQM Quantum Computers)
Johannes Heinsoo
(IQM Quantum Computers)
Caspar Ockeloen-Korppi
(IQM Quantum Computers)
With the introduction of pyEPR, users may with ease estimate qubit parameters, such as, energy levels and effects of material losses. Adding on top of existing automated simulations provided by KQC, pyEPR is seamlessly integrated into the workflow. A design from KQC can be exported to a pyEPR-compatible format and used in optimising the design.
In this work we study the contribution of two-level system losses in various interfaces to the quality factor of superconducting resonators and compare to measurements in order to extract scaling behaviour. We further apply the results to analyse real-world qubit geometries, demonstrating how this tool can facilitate the further development of high-coherence superconducting quantum devices.
[1] J. Heinsoo et al., ‘KQCircuits’. IQM Finland, Jun. 2021. GPLv3. doi: 10.5281/zenodo.4944796.
[2] Z. K. Minev et al., ‘pyEPR’. May. 2021. BSD. doi: 10.5281/zenodo.4744448.
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