Improved JPC performance via a low inductance, lumped element design

ORAL

Abstract

The Josephson Parametric Converter (JPC), a linear, non-degenerate, nearly quantum-limited amplifier, is a promising tool for quantum information applications. We propose a new JPC design characterized by the use of multi-pF parallel-plate capacitors. By decreasing the geometric inductance of the system, higher critical-current Josephson junctions can be used. Both the bandwidth and dynamic range can thus be increased by a factor of two relative to existing microstrip devices. When integrated with a shunted ring of Josephson junctions [1], these devices should also be tunable over more than a GHz. We present simulations of the circuit behavior and preliminary measurements of a proof-of-concept device. \\[4pt] [1] N. Roch et al., Phys. Rev. Lett. 108, 147701, 2012

*Work supported by: IARPA, ARO, and NSF

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Authors

  • A. Narla

    • Applied Physics Department, Yale University

  • K. Sliwa

    • Applied Physics Department, Yale University

  • M. Hatridge

    • Applied Physics Department, Yale University

  • S. Shankar

    • Applied Physics Department, Yale University

  • F. Schackert

    • Applied Physics Department, Yale University

  • B. Abdo

    • Applied Physics Department, Yale University

  • L. Frunzio

    • Applied Physics Department, Yale University

  • R.J. Schoelkopf

    • Applied Physics Department, Yale University

  • M.H. Devoret

    • Applied Physics Department, Yale University