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Demonstration of a circuit-QED maser based on a nanowire Josephson junction

ORAL

Abstract

On-chip coherent microwave generation can be achieved by strongly coupling a dc biased Josephson junction to a high quality factor superconducting cavity [1]. The incorporation of a gate-tunable semiconducting nanowire Josephson junction in such a device enables fast control of the junction-cavity coupling and laser emission, paving the way for efficient scalable on-chip microwave control of superconducting qubits.
In these devices, the efficient down-conversion at higher order harmonics stimulates the creation of multiple coherent photons with a single Cooper pair tunneling event, increasing the phase coherence. However, performance is currently limited by incoherent dissipative processes such as quasiparticle poisoning (QPP) that suppress the laser coherence.
Here we report on the quenching of the coherence above the 4th order harmonic. We track the emission dynamics of the 5th order harmonic in time and observe emission blinking due to QPP events with characteristic timescales Tpoisoning = 200 ± 10 μs and Tunpoisoning = 17 ± 2 μs.

Reference:
[1] M.C. Cassidy et al., Science 355, 939 (2017)

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Presenters

  • Willemijn Uilhoorn

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

Authors

  • Willemijn Uilhoorn

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Maja C Cassidy

    Microsoft Quantum Lab Sydney, University of Sydney

  • James Kroll

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Damaz De Jong

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft University of Technology

  • David J. Van Woerkom

    Microsoft Quantum Lab Delft, Delft University of Technology, Quantum Lab Delft, Microsoft, Microsoft Corp

  • Peter Krogstrup

    Microsoft Quantum Materials Lab and Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Kanalvej 7, 2800 Kongens Lyngby, Denmark, Microsoft, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen and Microsoft Quantum Materials Lab Copenhagen, Quantum Materials Lab Copenhagen, Microsoft, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, Microsoft Corp

  • Leo P Kouwenhoven

    Dept. of Physics, Technical University, Delft, The Netherlands, Microsoft Quantum Lab Delft, Microsoft Quantum Lab Delft, Delft University of Technology, Microsoft Corp Delft, Quantum Lab Delft, Microsoft, Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Microsoft Corp