Shortcuts to Adiabaticity in Digitized Adiabatic Quantum Computing

Narendra N. Hegade, Koushik Paul, Yongcheng Ding, Mikel Sanz, F. Albarrán-Arriagada, Enrique Solano, and Xi Chen
Phys. Rev. Applied 15, 024038 – Published 16 February 2021

Abstract

Shortcuts to adiabaticity are well-known methods for controlling the quantum dynamics beyond the adiabatic criteria, where counterdiabatic (CD) driving provides a promising means to speed up quantum many-body systems. In this work, we show the applicability of CD driving to enhance the digitized adiabatic quantum computing paradigm in terms of fidelity and total simulation time. We study the state evolution of an Ising spin chain using the digitized version of the standard CD driving and its variants derived from the variational approach. We apply this technique in the preparation of Bell and Greenberger-Horne-Zeilinger states with high fidelity using a very shallow quantum circuit. We implement this proposal on the IBM quantum computer, proving its usefulness for the speed up of adiabatic quantum computing in noisy intermediate-scale quantum devices.

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  • Received 9 September 2020
  • Revised 23 December 2020
  • Accepted 26 January 2021

DOI:https://doi.org/10.1103/PhysRevApplied.15.024038

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

Narendra N. Hegade1, Koushik Paul1,*, Yongcheng Ding1,2, Mikel Sanz2,3,4, F. Albarrán-Arriagada1, Enrique Solano1,2,3,4, and Xi Chen1,2,†

  • 1International Center of Quantum Artificial Intelligence for Science and Technology (QuArtist) and Department of Physics, Shanghai University, Shanghai 200444, China
  • 2Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, 48080 Bilbao, Spain
  • 3IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
  • 4IQM, Nymphenburgerstr. 86, 80636 Munich, Germany

  • *koushikpal09@gmail.com
  • xchen@shu.edu.cn

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Vol. 15, Iss. 2 — February 2021

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