Applications of InAs-Al Heterostructures in Quantum Computing

ORAL

Abstract

Josephson junctions created from Indium Arsenide (InAs) and Aluminum (Al) heterostructures allow for the integration of tunable superconductivity into microwave circuits. Superconducting circuits used for quantum computation can benefit from these type of elements in a variety of ways. In our group we have demonstrated how a highly transparent contact between a superconductor and a semiconductor allows a two dimensional electron gas in a layer of InAs to be proximitized by superconducting Al [1]. The 2DEG is gate voltage tunable. By using a simple gate electrode the carrier density of the 2DEG can be adjusted and consequently adjust the amount of supercurrent allowed to pass through the junction. This circuit element has been used to create a gate tunable modified transmon dubbed a gatemon [2]. Here we explore gatemon qubits and other use cases such as tunable resonators, tunable bus couplers and in general the use of InAs-Al heterostructures for superconducting circuits in the realm of quantum computing.

[1] W. Mayer, Appl. Phys. Lett. 114, 103104 (2019)
[2] L. Casparis, Nature Nanotechnology, volume 13, pages 915–919 (2018)

*We acknowledge support from the US Army Office of Research and the QuaCGR fellowship.

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Presenters

  • Joseph Yuan

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

Authors

  • Joseph Yuan

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

  • William Strickland

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

  • 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

  • Joshua Tong

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

  • Mehdi Hatefipour

    • NYU
    • New York Univ NYU

  • Kaushini S Wickramasinghe

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

  • Fatemeh Barati

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

  • Kasra Sardashti

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

  • 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