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

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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 languageUndefined
Pages (from-to)020503
JournalPhysical review B: Condensed matter and materials physics
Issue number2
Publication statusPublished - 2005


  • IR-57376

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