Four-body interactions in Kerr parametric oscillator circuits

ORAL

Abstract

We investigate four-body interactions in a Kerr parametric oscillator (KPO) circuit, which serves as a fundamental building block for a quantum annealer based on the Lechner-Hauke-Zoller scheme [1, 2, 3]. In this presentation, we introduce various types of KPO circuits that exhibit four-body interactions. Notably, such interactions can be realized without nonlinear couplers by leveraging KPO nonlinearities and circuit capacitance configurations, and the proposed circuits are scalable to large systems. Furthermore, we propose methods for experimentally determining the coupling constant and numerically analyzing oscillator and microwave drive parameters, based on the experimental setup established in our previous study [4].



[1] N. Sourlas, Phys. Rev. Lett. 94, 070601 (2005)

[2] W. Lechner, P. Hauke and P. Zoller, Sci. Adv. 1 (2015) no.9, 1500838

[3] S. Puri, C. K. Anderson, A. L. Grimsmo and A. Blais, Nature Commun. 8, (2017) no.1, 15785

[4] Y. Kawakami et al., APS Global Physics Summit 2025

*The device was fabricated in the clean room (Qufab) in National Institute of Advanced Industrial Science and Technology (AIST). This work is based on results obtained from a project, JPNP16007, commissioned by the New Energy and Industrial Technology Development Organization (NEDO).

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Presenters

  • Yohei Kawakami

    • NEC Corporation

Authors

  • Yohei Kawakami

    • NEC Corporation

  • Tomohiro Yamaji

    • NEC Corporation

  • Aiko Yamaguchi

    • NEC Corporation

  • Yuya Kano

    • NEC Corporation

  • Kiyotaka Endo

    • NEC Corporation

  • Tetsuro Satoh

    • AIST

  • Ayuka Morioka

    • NEC Corporation

  • Yuichi Igarashi

    • NEC Corporation

  • Masayuki Shirane

    • NEC Corporation

  • Tsuyoshi Yamamoto

    • NEC Corporation