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Transmon qubit modeling and characterization for Dark Matter search

Fuente: arXiv

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Détails bibliographiques
Auteurs principaux:	Moretti, R., Labranca, D., Campana, P., Carobene, R., Gobbo, M., Castellanos-Beltran, M. A., Olaya, D., Hopkins, P. F., Banchi, L., Borghesi, M., Candido, A., Carrazza, S., Corti, H. A., D'Elia, A., Faverzani, M., Ferri, E., Nucciotti, A., Origo, L., Pasquale, A., Komnang, A. S. Piedjou, Rettaroli, A., Tocci, S., Gatti, C., Giachero, A.
Format:	Preprint
Publié:	2024
Sujets:	Quantum Physics
Accès en ligne:	Acceder al recurso
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author	Moretti, R. Labranca, D. Campana, P. Carobene, R. Gobbo, M. Castellanos-Beltran, M. A. Olaya, D. Hopkins, P. F. Banchi, L. Borghesi, M. Candido, A. Carrazza, S. Corti, H. A. D'Elia, A. Faverzani, M. Ferri, E. Nucciotti, A. Origo, L. Pasquale, A. Komnang, A. S. Piedjou Rettaroli, A. Tocci, S. Gatti, C. Giachero, A.
author_facet	Moretti, R. Labranca, D. Campana, P. Carobene, R. Gobbo, M. Castellanos-Beltran, M. A. Olaya, D. Hopkins, P. F. Banchi, L. Borghesi, M. Candido, A. Carrazza, S. Corti, H. A. D'Elia, A. Faverzani, M. Ferri, E. Nucciotti, A. Origo, L. Pasquale, A. Komnang, A. S. Piedjou Rettaroli, A. Tocci, S. Gatti, C. Giachero, A.
contents	This study presents the design, simulation, and experimental characterization of a superconducting transmon qubit circuit prototype for potential applications in dark matter detection experiments. We describe a planar circuit design featuring two non-interacting transmon qubits, one with fixed frequency and the other flux tunable. Finite-element simulations were employed to extract key Hamiltonian parameters and optimize component geometries. The qubit was fabricated and then characterized at $20$ mK, allowing for a comparison between simulated and measured qubit parameters. Good agreement was found for transition frequencies and anharmonicities (within 1\% and 10\% respectively) while coupling strengths exhibited larger discrepancies (30\%). We discuss potential causes for measured coherence times falling below expectations ($T_1\sim\,$1-2 \textmu s) and propose strategies for future design improvements. Notably, we demonstrate the application of a hybrid 3D-2D simulation approach for energy participation ratio evaluation, yielding a more accurate estimation of dielectric losses. This work represents an important first step in developing planar Quantum Non-Demolition (QND) single-photon counters for dark matter searches, particularly for axion and dark photon detection schemes.
format	Preprint
id	arxiv_https___arxiv_org_abs_2409_05988
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Transmon qubit modeling and characterization for Dark Matter search Moretti, R. Labranca, D. Campana, P. Carobene, R. Gobbo, M. Castellanos-Beltran, M. A. Olaya, D. Hopkins, P. F. Banchi, L. Borghesi, M. Candido, A. Carrazza, S. Corti, H. A. D'Elia, A. Faverzani, M. Ferri, E. Nucciotti, A. Origo, L. Pasquale, A. Komnang, A. S. Piedjou Rettaroli, A. Tocci, S. Gatti, C. Giachero, A. Quantum Physics This study presents the design, simulation, and experimental characterization of a superconducting transmon qubit circuit prototype for potential applications in dark matter detection experiments. We describe a planar circuit design featuring two non-interacting transmon qubits, one with fixed frequency and the other flux tunable. Finite-element simulations were employed to extract key Hamiltonian parameters and optimize component geometries. The qubit was fabricated and then characterized at $20$ mK, allowing for a comparison between simulated and measured qubit parameters. Good agreement was found for transition frequencies and anharmonicities (within 1\% and 10\% respectively) while coupling strengths exhibited larger discrepancies (30\%). We discuss potential causes for measured coherence times falling below expectations ($T_1\sim\,$1-2 \textmu s) and propose strategies for future design improvements. Notably, we demonstrate the application of a hybrid 3D-2D simulation approach for energy participation ratio evaluation, yielding a more accurate estimation of dielectric losses. This work represents an important first step in developing planar Quantum Non-Demolition (QND) single-photon counters for dark matter searches, particularly for axion and dark photon detection schemes.
title	Transmon qubit modeling and characterization for Dark Matter search
topic	Quantum Physics
url	https://arxiv.org/abs/2409.05988