APS Logo

Towards High-Fidelity Gates in the Soft Zero-Pi Qubit

ORAL

Abstract

The zero-pi qubit [1, 2] is intrinsically protected against relaxation and dephasing, making it a promising candidate for high-fidelity quantum processing. A recent implementation of the “soft” zero-pi circuit showed experimental evidence of protection and achieved logical operations via a Raman transition [3]. Here, we address some outstanding challenges facing the soft zero-pi qubit. For example, we achieve faster gates via a fast-flux drive through an inductively-coupled bias line. The improvements we made allow for longer coherence times and higher fidelity gates.

[1] A. Kitaev. arXiv:cond-mat/0609441 (2006).
[2] P. Brooks, A. Kitaev, J. Preskill. Phys. Rev. A 87, 052306 (2013).
[3] A. Gyenis, P. Mundada, A. Di Paolo et. al. arXiv:1910.07542 (2019).

–

Presenters

  • Anjali Premkumar

    Princeton University

Authors

  • Anjali Premkumar

    Princeton University

  • Andras Gyenis

    Princeton University, Department of Electrical Engineering, Princeton University

  • Xanthe Croot

    Princeton University

  • Pranav Mundada

    Princeton University, Q-CTRL, Department of Electrical Engineering, Princeton University

  • Agustin Di Paolo

    Physics, Universite de Sherbrooke, Universite de Sherbrooke, Département de Physique, Université de Sherbrooke, Institut quantique & Departement de Physique, Universite de Sherbrooke

  • Jens Koch

    Physics, Northwestern University, Northwestern University, Department of Physics and Astronomy, Northwestern University, Physics and Astronomy, Northwestern University

  • Alexandre Blais

    Universite de Sherbrooke, Institut Quantique and Département de Physique, Université de Sherbrooke, Physics, Universite de Sherbrooke, Université de Sherbrook, Université de Sherbrooke, Département de Physique, Université de Sherbrooke, Institut quantique & Departement de Physique, Universite de Sherbrooke, Institut quantique and Departement de physique, Universite de Sherbrooke, Institut Quantique and Department de Physique, Universite de Sherbrooke, Institut quantique and Departement de Physique, Universite de Sherbrooke

  • Andrew Houck

    Princeton University, Department of Electrical Engineering, Princeton University