Flux qubits with long coherence times for hybrid quantum circuits

M. Stern; G. Catelani; Y. Kubo; C. Grezes; A. Bienfait; D. Vion; D. Esteve; P. Bertet

doi:10.1103/PhysRevLett.113.123601

Flux qubits with long coherence times for hybrid quantum circuits

M. Stern, G. Catelani, Y. Kubo, C. Grezes, A. Bienfait, D. Vion, D. Esteve, P. Bertet

Research output: Contribution to journal › Article › peer-review

130 Scopus citations

Abstract

We present measurements of superconducting flux qubits embedded in a three dimensional copper cavity. The qubits are fabricated on a sapphire substrate and are measured by coupling them inductively to an on-chip superconducting resonator located in the middle of the cavity. At their flux-insensitive point, all measured qubits reach an intrinsic energy relaxation time in the 6-20μs range and a pure dephasing time comprised between 3 and 10μs. This significant improvement over previous works opens the way to the coherent coupling of a flux qubit to individual spins.

Original language	English
Article number	123601
Journal	Physical Review Letters
Volume	113
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.113.123601
State	Published - 19 Sep 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 American Physical Society.

Funding

Funders	Funder number
European Commission
Japan Society for the Promotion of Science London
Research Executive Agency	CIG-618258
Seventh Framework Programme	618258, 615767

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10.1103/PhysRevLett.113.123601

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AU - Vion, D.

AU - Esteve, D.

AU - Bertet, P.

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Flux qubits with long coherence times for hybrid quantum circuits

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