Theoretical study of nonreciprocal microwave transmission based on Gebhard-Ruckenstein hopping

ORAL

Abstract

Several types of quantum information processing schemes and many of superconducting quantum optics experiments require routing of microwaves in a cryostat. Thus, cryogenic circulator is an important tool, and the loss at the circulators is detrimental especially for quantum information processing. This has been urging many researchers to experimental and theoretical works devoted to lossless on-chip microwave circulators.
In this presentation, we theoretically investigate the nonreciprocal microwave transmission based on the Gebhard-Ruckenstein hopping. We consider a superconducting device that consists of microwave resonators and a coupler. The Gebhard-Ruckenstein hopping between the resonators gives rise to a linear energy dispersion, which manifests chiral propagation of microwaves in the device. This device can work as a microscopic circulator when transmission lines are attached. It is shown that our microwave circulator can be robust against detuning of incident microwaves.

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Presenters

  • Shumpei Masuda

    QCD Labs, Aalto University, Tokyo Medical and Dental University

Authors

  • Shumpei Masuda

    QCD Labs, Aalto University, Tokyo Medical and Dental University

  • Shingo Kono

    Research Center for Advanced Science and Technology, The University of Tokyo, The University of Tokyo

  • Keishi Suzuki

    The University of Tokyo

  • Yuuki Tokunaga

    NTT SC Labs., NTT Secure Platform Laboratories, NTT Corporation

  • Yasunobu Nakamura

    Center for Emergent Matter Science (CEMS), RIKEN, University of Tokyo, Research Center for Advanced Science and Technology, The University of Tokyo, RIKEN Center for Emergent Matter Science, The University of Tokyo

  • Kazuki Koshino

    Tokyo Medical and Dental University, College of Liberal Arts and Sciences, Tokyo Medical and Dental University