A Hybrid 3D Qubit Architecture for Probing Quantum Materials

ORAL

Abstract

Superconducting quantum circuits are gaining traction as a platform for probing and characterizing new quantum materials due to their high coherence, strong coupling, and efficient control/readout. Using the tools of circuit QED, it is possible to explore material properties using coherent microwave photons at the single quantum level. We have designed and fabricated a transmon-like qubit with superconductor-TI-superconductor (S-TI-S) junctions in the 3D cavity architecture. The system is characterized by spectroscopic measurements, and time-domain measurements reveal coherence properties. The unconventional current-phase relationship in TI junctions could lead to noise resilience for certain decoherence channels. We discuss methods to realize frequency tunable 3D TI-Transmons by either using an on-chip voltage gate, or by forming an asymmetrical SQUID with one S-TI-S junction and one conventional S-I-S Josephson junction. Here, I will discuss our experimental progress, results, and future directions for using circuit QED devices for understanding new quantum materials.

*Purdue University; Quantum Science Center

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Presenters

  • Ramya Suresh

    • Purdue University

Authors

  • Ramya Suresh

    • Purdue University

  • Sheng-Wen Huang

    • Purdue University

  • Botao Du

    • Purdue University

  • Peter Salisbury

    • Purdue University

  • Jian Liao

    • Purdue University

  • Yong P. Chen

    • Purdue University
    • Department of Physics and Astronomy, and Birck Nanotechnology Center, Purdue University; West Lafayette, Indiana 47907, USA

  • Leonid P Rokhinson

    • Purdue University
    • Department of Physics and Astronomy, Purdue University

  • Ruichao Ma

    • Purdue University