Single-tone pulse sequences and robust two-tone shaped pulses for three silicon spin qubits with always-on exchange

David W. Kanaar, Sidney Wolin, Utkan Güngördü, and J. P. Kestner
Phys. Rev. B 103, 235314 – Published 22 June 2021; Erratum Phys. Rev. B 105, 119904 (2022)

Abstract

Quantum computation requires high-fidelity single-qubit and two-qubit gates on a scalable platform. Silicon spin qubits are a promising platform toward realization of this goal. In this paper we show how to perform single-qubit and controlled-Z (cz) gates in a linear chain of three spin qubits with always-on exchange coupling, which is relevant for certain dot- and donor-based silicon devices. We also show how to make the cz gate robust against both charge noise and pulse length error using a two-tone pulse shaping method. The robust pulse maintains a fidelity of 99.99% at 3.5% fluctuations in exchange or pulse amplitude, which is an improvement over the uncorrected pulses where this fidelity can only be maintained for fluctuations in exchange up to 2% or up to 0.2% in amplitude.

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  • Received 16 February 2021
  • Accepted 7 June 2021

DOI:https://doi.org/10.1103/PhysRevB.103.235314

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Erratum

Authors & Affiliations

David W. Kanaar*, Sidney Wolin, Utkan Güngördü, and J. P. Kestner

  • Department of Physics, University of Maryland Baltimore County, Baltimore, Maryland 21250, USA

  • *Corresponding author: dkanaar1@umbc.edu
  • Current address: Laboratory for Physical Sciences, College Park, Maryland 20740, USA.

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Issue

Vol. 103, Iss. 23 — 15 June 2021

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