Three phases of quantum annealing: Fast, slow, and very slow
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Author/Creator ORCID
Date
2022-04-14
Type of Work
Department
Program
Citation of Original Publication
Soriani, Artur et al. "Three phases of quantum annealing: Fast, slow, and very slow." Phys. Rev. A 105, 042423 (14 April 2022). https://doi.org/10.1103/PhysRevA.105.042423
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May be used only for educational or research purposes.
Subjects
Abstract
Currently, existing quantum annealers have proven themselves as viable technology for the first practical applications in the noisy-intermediate-scale-quantum era. However, to fully exploit their capabilities, a comprehensive characterization of their finite-time excitations is instrumental. To this end, we develop a phase diagram for driven Ising chains, from which the scaling behavior of the excess work can be read off as a function of process duration and system size. “Fast” processes are well described by the Kibble-Zurek mechanism; “slow” process are governed by effective Landau-Zener dynamics; and “very slow” processes can be approximated with adiabatic perturbation theory.