Improving the dynamic range of the Josephson Bifurcation Amplifier

ORAL

Abstract

The dynamic range of the Josephson Bifurcation Amplifier (JBA), acting as a phase-sensitive amplifier, can be improved by combination of several junctions in series and parallel in place of the single junction present in the original device. By analyzing the circuit Hamiltonian for a system with many amplifiers tiled in parallel, each containing junctions wired in series, a potential increase in the amplifier's dynamic range can be obtained while maintaining GHz-range tunability. Theoretical results and preliminary experimental data will be presented.

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Authors

  • Laszlo Szocs

    Yale Univ

  • M. Hatridge

    Yale Univ, Department of Applied Physics, Yale University

  • S. Shankar

    Yale Univ, Department of Applied Physics, Yale University

  • A. Narla

    Yale Univ, Department of Applied Physics, Yale University

  • K.M. Sliwa

    Yale University, Departments of Applied Physics and Physics, Yale University, Yale Univ, Department of Applied Physics, Yale University

  • M.H. Devoret

    Yale University, Yale Univ, Department of Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University