Hybrid rf SQUID qubit based on high kinetic inductance

J. T. Peltonen; P. C.J.J. Coumou; Z. H. Peng; T. M. Klapwijk; J. S. Tsai; O. V. Astafiev

doi:10.1038/s41598-018-27154-1

Hybrid rf SQUID qubit based on high kinetic inductance

J. T. Peltonen^*, P. C.J.J. Coumou, Z. H. Peng, T. M. Klapwijk, J. S. Tsai, O. V. Astafiev

^*Corresponding author for this work

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Abstract

We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high anharmonicity, and small scatter of device parameters. The work constitutes a non-tunable prototype realization of an rf SQUID qubit built on the kinetic inductance of a superconducting nanowire, proposed in Phys. Rev. Lett. 104, 027002 (2010). The hybrid devices can be utilized as tools to shed further light onto the origin of film dissipation and decoherence in phase-slip nanowire qubits, patterned entirely from disordered superconducting films.

Original language	English
Article number	10033
Number of pages	8
Journal	Scientific Reports
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41598-018-27154-1
Publication status	Published - 2018

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title = "Hybrid rf SQUID qubit based on high kinetic inductance",

abstract = "We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high anharmonicity, and small scatter of device parameters. The work constitutes a non-tunable prototype realization of an rf SQUID qubit built on the kinetic inductance of a superconducting nanowire, proposed in Phys. Rev. Lett. 104, 027002 (2010). The hybrid devices can be utilized as tools to shed further light onto the origin of film dissipation and decoherence in phase-slip nanowire qubits, patterned entirely from disordered superconducting films.",

author = "Peltonen, {J. T.} and Coumou, {P. C.J.J.} and Peng, {Z. H.} and Klapwijk, {T. M.} and Tsai, {J. S.} and Astafiev, {O. V.}",

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AU - Peltonen, J. T.

AU - Coumou, P. C.J.J.

AU - Peng, Z. H.

AU - Klapwijk, T. M.

AU - Tsai, J. S.

AU - Astafiev, O. V.

PY - 2018

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N2 - We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high anharmonicity, and small scatter of device parameters. The work constitutes a non-tunable prototype realization of an rf SQUID qubit built on the kinetic inductance of a superconducting nanowire, proposed in Phys. Rev. Lett. 104, 027002 (2010). The hybrid devices can be utilized as tools to shed further light onto the origin of film dissipation and decoherence in phase-slip nanowire qubits, patterned entirely from disordered superconducting films.

AB - We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN with high kinetic inductance. Here we demonstrate that the systems can offer small physical size, high anharmonicity, and small scatter of device parameters. The work constitutes a non-tunable prototype realization of an rf SQUID qubit built on the kinetic inductance of a superconducting nanowire, proposed in Phys. Rev. Lett. 104, 027002 (2010). The hybrid devices can be utilized as tools to shed further light onto the origin of film dissipation and decoherence in phase-slip nanowire qubits, patterned entirely from disordered superconducting films.

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Hybrid rf SQUID qubit based on high kinetic inductance

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