Entangling flux qubits with a bipolar dynamic inductance

B. L.T. Plourde, J. Zhang, K. B. Whaley, F. K. Wilhelm, T. L. Robertson, T. Hime, S. Linzen, P. A. Reichardt, C. E. Wu, John Clarke

Research output: Contribution to journalArticle

90 Scopus citations

Abstract

We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.

Original languageEnglish (US)
Article number140501
Pages (from-to)140501-1-140501-4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number14
DOIs
StatePublished - Oct 2004
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Entangling flux qubits with a bipolar dynamic inductance'. Together they form a unique fingerprint.

  • Cite this

    Plourde, B. L. T., Zhang, J., Whaley, K. B., Wilhelm, F. K., Robertson, T. L., Hime, T., Linzen, S., Reichardt, P. A., Wu, C. E., & Clarke, J. (2004). Entangling flux qubits with a bipolar dynamic inductance. Physical Review B - Condensed Matter and Materials Physics, 70(14), 140501-1-140501-4. [140501]. https://doi.org/10.1103/PhysRevB.70.140501