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Fast crosstalk-free perfect entangler in a tunable coupling superconducting circuit

ORAL

Abstract

On-demand strong qubit-qubit interactions are crucial for the realization of a scalable quantum computer. Currently, the performance of high coherence transmons is limited by unwanted cross-Kerr or "ZZ" crosstalk. Using interference between two couplers has been previously shown to mitigate ZZ crosstalk. Here, we provide a novel tunable coupler design that harnesses interference due to the higher energy levels to achieve zero static ZZ coupling between the two qubits. Biasing to zero ZZ interaction, we realize a fast perfect entangler with parametric flux modulation and investigate the gate fidelity using randomized benchmarking.

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Presenters

  • Pranav Mundada

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

Authors

  • Pranav Mundada

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

  • Andrei Vrajitoarea

    Princeton University, University of Chicago

  • Alexander Place

    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

  • Camille Le Calonnec

    Universite de Sherbrooke

  • Alexandru Petrescu

    Universite de Sherbrooke, Université de Sherbrook

  • Catherine Leroux

    Universite de Sherbrooke, Département de Physique, Université de Sherbrooke

  • 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