APS Logo

Cancellation of unwanted ZZ interactions by superconducting qubit engineering

ORAL

Abstract

We present a method to cancel the unwanted always-on ZZ interaction in transmon based qubit architectures by qubit engineering. We employ a new engineered qubit, which operates as a weakly anharmonic oscillator and has anharmonicity comparable to the transmon qubit, but with a positive sign. We test this concept on the cross-resonance-gate architecture [1] and outline various strategies for optimal chip design. Based on that, we design a new architecture for a superconducting quantum processor that has an inherent suppression of the unwanted ZZ interactions. Our work addresses on one of the major challenges in a commonly used architecture for superconducting quantum processors, and it enables higher fidelity multiqubit gates.

[1] Chow, J. M. et al. Phys. Rev. Lett. 107, 080502 (2011).

–

Presenters

  • Roni Winik

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology

Authors

  • Roni Winik

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology

  • Catherine Leroux

    Universite de Sherbrooke, Institut quantique and Departement de Physique, Universite de Sherbrooke, Département de Physique, Université de Sherbrooke, University of Sherbrooke

  • Agustin Di Paolo

    Institut quantique and Departement de Physique, Universite de Sherbrooke, Universite de Sherbrooke, Département de Physique, Université de Sherbrooke, Institut quantique & Département de Physique, Université de Sherbrooke, Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Canada, Institut quantique and Département de Physique, Universite de Sherbrooke

  • Jochen Braumueller

    Massachusetts Institute of Technology MIT, Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts Institute of Technology

  • Morten Kjaergaard

    Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts Institute of Technology

  • Antti Vepsalainen

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT

  • David K Kim

    MIT Lincoln Laboratory, MIT Lincoln Lab, MIT-Lincoln Lab, MIT Lincoln Laboratories, Lincoln Laboratory, Massachusetts Institute of Technology (MIT), Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Jonilyn Yoder

    MIT Lincoln Laboratory, MIT Lincoln Lab, Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Alexander Melville

    MIT Lincoln Laboratory, MIT Lincoln Lab, MIT Lincoln Laboratories, Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Bethany Niedzielski

    MIT Lincoln Laboratory

  • Alexandre Blais

    Universite de Sherbrooke, Institut quantique and Departement de Physique, Universite de Sherbrooke, Institut Quantique, Universite de Sherbrooke, Département de Physique, Université de Sherbrooke, Institut quantique & Département de Physique, Université de Sherbrooke, Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Canada, Institut quantique and Département de Physique, Universite de Sherbrooke

  • Simon Gustavsson

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology (MIT)

  • William Oliver

    Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Techn, MIT Lincoln Lab, MIT Lincoln Laboratory, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Department of Physics, Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Department of Electrical Engineering and Computer Science, Department of Physics, Massachusetts Institute of Technology; MIT Lincoln Laboratory, Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Department of Electrical Engineering & Computer Science, Department of Physics, Massachusetts Institute of Technology and MIT Lincoln Labo, Physics, MIT, MIT-Lincoln Lab, MIT Lincoln Laboratories, Research Laboratory of Electronics, Department of Physics, Department of Electrical Engineering and Computer Science, Lincoln Laboratory, Massachusetts Institute of Technolog