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Observation and manipulation of quantum interference in a superconducting Kerr parametric oscillator.
Iyama, Daisuke; Kamiya, Takahiko; Fujii, Shiori; Mukai, Hiroto; Zhou, Yu; Nagase, Toshiaki; Tomonaga, Akiyoshi; Wang, Rui; Xue, Jiao-Jiao; Watabe, Shohei; Kwon, Sangil; Tsai, Jaw-Shen.
Afiliação
  • Iyama D; Department of Physics, Graduate School of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.
  • Kamiya T; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Fujii S; Department of Physics, Graduate School of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.
  • Mukai H; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Zhou Y; Department of Physics, Graduate School of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.
  • Nagase T; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Tomonaga A; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Wang R; Research Institute for Science and Technology, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.
  • Xue JJ; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Watabe S; Department of Physics, Graduate School of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.
  • Kwon S; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
  • Tsai JS; RIKEN Center for Quantum Computing (RQC), Wako-shi, Saitama, Japan.
Nat Commun ; 15(1): 86, 2024 Jan 02.
Article em En | MEDLINE | ID: mdl-38167480
ABSTRACT
Quantum tunneling is the phenomenon that makes superconducting circuits "quantum". Recently, there has been a renewed interest in using quantum tunneling in phase space of a Kerr parametric oscillator as a resource for quantum information processing. Here, we report a direct observation of quantum interference induced by such tunneling and its dynamics in a planar superconducting circuit through Wigner tomography. We experimentally elucidate all essential properties of this quantum interference, such as mapping from Fock states to cat states, a temporal oscillation due to the pump detuning, as well as its characteristic Rabi oscillations and Ramsey fringes. Finally, we perform gate operations as manipulations of the observed quantum interference. Our findings lay the groundwork for further studies on quantum properties of superconducting Kerr parametric oscillators and their use in quantum information technologies.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article