Tunable Capacitor For Superconducting Qubits Using an InAs/InGaAs Heterostructure

ORAL

Abstract

Adoption of fast, parametric coupling elements has improved the performance of superconducting qubits, enabling recent demonstrations of a quantum advantage in randomized sampling problems. The development of low loss, high contrast couplers is critical for scaling up these systems. We present a blueprint for a gate-tunable coupler realized with a two-dimensional electron gas in an InAs/InGaAs heterostructure. Our numerical simulations yield an on/off ratio of over two orders of magnitude. We give an estimate of the dielectric-limited loss from the inclusion of the coupler in a two qubit system.

*We acknowledge support from the Graduate Fellowships for STEM Diversity, NSF grant No. PHY-1653820, ARO grant No. W911NF-18-1-0125 and LPS/ARO grant No. W911NF1810115.

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Presenters

  • Nicholas Materise

    • Department of Physics, Colorado School of Mines

Authors

  • Nicholas Materise

    • Department of Physics, Colorado School of Mines

  • Matthieu Dartiailh

    • New York Univ NYU
    • Center for Quantum Phenomena, Department of Physics, New York University
    • NYU
    • Center for Quantum Phenemena, Department of Physics, New York University
    • Center for Quantum Phenomena, Department of Physics, New York University, New York, New York

  • Javad Shabani

    • New York Univ NYU
    • Center for Quantum Phenomena, Department of Physics, New York University
    • NYU
    • Center for Quantum Phenemena, Department of Physics, New York University
    • New York University
    • Center for Quantum Phenomena, Department of Physics, New York University, New York, New York

  • Eliot Kapit

    • Physics, Colorado School of Mines
    • Colorado School of Mines
    • Department of Physics, Colorado School of Mines