Direct Josephson coupling between superconducting flux qubits

M. Grajcar; A. Izmalkov; S.H.W. van der Ploeg; S. Linzen; E. IlÍchev; Th. Wagner; U. Huebner

doi:10.1103/PhysRevB.72.020503

Direct Josephson coupling between superconducting flux qubits

M. Grajcar, A. Izmalkov, S.H.W. van der Ploeg, S. Linzen, E. IlÍchev, Th. Wagner, U. Huebner

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic

45 Citations (Scopus)

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Abstract

We have demonstrated strong antiferromagnetic coupling between two three-junction flux qubits based on a shared Josephson junction, and therefore not limited by the small inductances of the qubit loops. The coupling sign and magnitude were measured by coupling the system to a high-quality superconducting tank circuit. Design modifications allowing to continuously tune the coupling strength and/or make the coupling ferromagnetic are discussed.

Original language	Undefined
Pages (from-to)	020503
Journal	Physical review B: Condensed matter and materials physics
Volume	72
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.72.020503
Publication status	Published - 2005

Keywords

IR-57376

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10.1103/PhysRevB.72.020503

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Cite this

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AU - Grajcar, M.

AU - Izmalkov, A.

AU - van der Ploeg, S.H.W.

AU - Linzen, S.

AU - IlÍchev, E.

AU - Wagner, Th.

AU - Huebner, U.

PY - 2005

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AB - We have demonstrated strong antiferromagnetic coupling between two three-junction flux qubits based on a shared Josephson junction, and therefore not limited by the small inductances of the qubit loops. The coupling sign and magnitude were measured by coupling the system to a high-quality superconducting tank circuit. Design modifications allowing to continuously tune the coupling strength and/or make the coupling ferromagnetic are discussed.

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U2 - 10.1103/PhysRevB.72.020503

DO - 10.1103/PhysRevB.72.020503

M3 - Article

VL - 72

SP - 020503

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

SN - 1098-0121

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