Competition of Quasiparticles and Magnetization Noise in Hybrid Ferromagnetic Transmon Qubits

Year: 2023

Authors: Ahmad H.G.; Brosco V.; Miano A.; Di Palma L.; Arzeo M.; Satariano R.; Ferraiuolo R.; Lucignano P.; Vettoliere A.; Granata C.; Parlato L.; Ausanio G.; Montemurro D.; Pepe G.P.; Fazio R.; Tafuri F.; Massarotti D.

Autors Affiliation: Universita Degli Studi di Napoli Federico Ii, Dipartimento di Ingegneria Elettrica e Tecnologie Dell?Informazione, Napoli, I-80125, Universita degli Studi di Napoli Federico II, Dipartimento di Ingegneria Elettrica e Tecnologie dell?Informazione, Napoli, Italy, I-80125, Italy; CNR-SPIN, c/o Monte Sant?Angelo, Napoli, I-80126, CNR-SPIN, c/o Monte Sant?Angelo, Napoli, Italy, I-80126, , Italy; Universita di Roma la Sapienza, Dipartimento di Fisica, Roma, 00185, Universita di Roma La Sapienza, Dipartimento di Fisica, Roma, 00185, Italy; Universita di Roma la Sapienza, Dipartimento di Fisica, Roma, 00185, Universita di Roma La Sapienza, Dipartimento di Fisica, Roma, Italy, 00185, Italy; ISC-CNR, Roma, 00185, ISC-CNR, Roma, Italy, 00185, Italy; Universita Degli Studi di Napoli Federico Ii, Dipartimento di Fisica, Napoli, I-80125, Universita degli Studi di Napoli Federico II, Dipartimento di Fisica, Napoli, Italy, I-80125, Italy; Yale University, Department of Applied Physics, New Haven, CT, 06520, Yale University, Department of Applied Physics, New Haven, CT, USA, 06520, , United States; SEEQC-EU, Napoli, 80146, SEEQC-EU, Napoli, 80146, Italy; Consiglio Nazionale Delle Ricerche – Isasi, Pozzuoli, I-80078, Consiglio Nazionale delle Ricerche – ISASI, Pozzuoli, I-80078,Italy; Consiglio Nazionale Delle Ricerche – Isasi, Pozzuoli, I-80078, Consiglio Nazionale delle Ricerche – ISASI, Pozzuoli, I-80078, Italy; Physical Sciences, University of Naples Federico Ii and CNR-INFM Coherentia, Naples, 80100, Physical Sciences, University of Naples Federico II and CNR-INFM Coherentia, Naples, 80100, Italy; Physical Sciences, University of Naples Federico Ii and CNR-INFM Coherentia, Naples, 80100, Physical Sciences, University of Naples Federico II and CNR-INFM Coherentia, Naples, 80100, Italy; Physical Sciences, University of Naples Federico Ii and CNR-INFM Coherentia, Naples, 80100, Physical Sciences, University of Naples Federico II and CNR-INFM Coherentia, Naples, 80100, Italy; International School for Advanced Studies (SISSA), Trieste, I-34014, International School for Advanced Studies (SISSA), Trieste, I-34014, Italy; CNR-Istituto Nazionale di Ottica (CNR-INO), Largo, 50125,Italy,

Abstract: The coexistence between ferromagnetic ordering and superconducting transport in tunnel ferromagnetic Josephson junctions (SFS JJs) accounts for a wide range of unconventional physical properties. The integration of both insulating ferromagnets or multi-layered insulator-ferromagnet barriers allows to combine ferromagnetic switching properties with peculiar low quasiparticle dissipation, which could enhance the capabilities of SFS JJs as active elements in quantum circuits. Here we show that split-transmon qubits based on tunnel ferromagnetic JJs realize an ideal playground to study noise fluctuations in ferromagnetic Josephson devices. By considering the transport properties of measured Al-based tunnel SFS JJs, we report on a theoretical study of the competition between intrinsic magnetization fluctuations in the barrier and quasiparticles dissipation, thus providing specific operation regimes to identify and disentangle the two noise sources, depending on the peculiar properties of the F layer and F/S interface.

Journal/Review: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY

Volume: 33 (5)      Pages from: 1700306-1  to: 1700306-6

More Information: The work of Domenico Montemurro was supported by PON R & I2014-2020 through AIM: Attraction and International Mobility Linea 1 Mobilitadei ricercatori under Grant CUP E66C19000060001. This work was supportedin part by the Project EffQul-Efficient Integration of hybrid Quantum Devices-Ricerca di Ateneo Linea A under Grant CUP E59C20001 010005, in part by the PNRR MUR Project CN_00000013 -ICSC, in part by the Project On-chipsignal generation for superconducting Quantum Processors (SFQ4QPU) in the frame of Eurostars CoD15 Call 2021, in part by the project SQUAD-On-chipcontrol and advanced read-out for superconducting qubit arrays (SQUAD) in the frame of Programme STAR Plus, in part by UniNA and Compagnia di San Paolo, in part by the Project Superconducting quantum-classical linked com-puting systems (SuperLink) in the frame of QuantERA2 ERANET COFUNDin Quantum Technologies, and in part by European Union – PON Ricerca eInnovazione 2014-2020 FESR/FSC – under Project ARS01_00734 QUANCOM.
KeyWords: Qubit, Magnetization, Josephson junctions, Magnetic flux, Superconducting magnets, Magnetic tunneling, Superconducting device noise
DOI: 10.1109/TASC.2023.3243197

Citations: 3
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