Direct Josephson coupling between superconducting flux qubits

M. Grajcar, A. Izmalkov, S. H W Van Der Ploeg, S. Linzen, E. Il'ichev, Th Wagner, U. Hübner, H. G. Meyer, Alec Maassen Van Den Brink, S. Uchaikin, A. M. Zagoskin

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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 languageEnglish
Article number020503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number2
DOIs
Publication statusPublished - 1 Jul 2005

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ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Grajcar, M., Izmalkov, A., Van Der Ploeg, S. H. W., Linzen, S., Il'ichev, E., Wagner, T., ... Zagoskin, A. M. (2005). Direct Josephson coupling between superconducting flux qubits. Physical Review B - Condensed Matter and Materials Physics, 72(2), [020503]. https://doi.org/10.1103/PhysRevB.72.020503