[en] The classical spin-vector Monte Carlo (SVMC) model is a reference benchmark for the performance of a quantum annealer. Yet, as a Monte Carlo method, SVMC is unsuited for an accurate description of the annealing dynamics in real-time.We introduce the spin-vector Langevin (SVL) model as an alternative benchmark in which the time evolution is described by Langevin dynamics. The SVL model is shown to provide a more stringent test than the SVMC model for the identification of quantum signatures in the performance of quantum annealing devices, as we illustrate by describing the Kibble-Zurek scaling associated with the dynamics of symmetry breaking in the transverse field Ising model, recently probed using D-Wave machines. Specifically, we show that D-Wave data are reproduced by the SVL model.
Disciplines :
Physics
Author, co-author :
Subires, David; Donostia International Physics Center, E-20018 San Sebastián, Spain
Gómez-Ruiz, Fernando J.; Instituto de Física Fundamental IFF-CSIC, Calle Serrano 113b, Madrid 28006, Spain ; Donostia International Physics Center, E-20018 San Sebastián, Spain
Ruiz-García, Antonia; Instituto Universitario de Estudios Avanzados (IUdEA) and Departamento de Física, Universidad de La Laguna, La Laguna 38203, Spain
Alonso, Daniel; Instituto Universitario de Estudios Avanzados (IUdEA) and Departamento de Física, Universidad de La Laguna, La Laguna 38203, Spain
Del Campo Echevarria, Adolfo ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
yes
Language :
English
Title :
Benchmarking quantum annealing dynamics: The spin-vector Langevin model
