Implementing pulse-based VQE (ctrl-VQE) algorithm on NISQ devices.

ORAL

Abstract

Unlike the gate-based Variational Quantum Eigensolvers (VQE), ctrl-VQE directly uses control pulse parameters as variational parameters, which can greatly reduce the ground state preparation time [1]. Here we present the minimum time control pulses for ctrl-VQE to prepare target molecular ground states for a given device’s Hamiltonian [2]. We noticed that the leakage outside the computational space can speed up the state preparation. Furthermore, we explore its application on NISQ devices by studying the effects of the experimental imperfections of ctrl-VQE in parametrically-coupled transmon devices [3].

*S.E.E. acknowledges support from the DOE Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA), contract number DESC0012704. E.B. and N.J.M acknowledge Award No. DE-SC0019199.

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Publication: [1] O.R. Meitei et al, npj Quantum Inf, 7, 155 (2021).
[2] A. Asthana et al, arXiv:2203.06818
[3] X. Jin et al., "A versatile parametric coupler between two transmon qubits", Bulletin of the American Physical Society (2022).

Presenters

  • Chenxu Liu

    • Virginia Tech

Authors

  • Chenxu Liu

    • Virginia Tech

  • Ayush Asthana

    • Virginia Tech

  • Tongyu Zhao

    • National Institute of Standards and Technology
    • National Institute of Standards and Technology Boulder
    • University of Colorado Boulder
    • University of Colorado, Boulder

  • Raymond W Simmonds

    • National Institute of Standards and Technology, Boulder
    • National Institute of Standards and Technology Boulder

  • Nicholas Mayhall

    • Virginia Tech

  • Edwin Barnes

    • Virginia Tech

  • Sophia Economou

    • Virginia Tech
    • VirginiaTech