Reference : Benchmarking quantum annealing dynamics: The spin-vector Langevin model

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/52152

Title :	Benchmarking quantum annealing dynamics: The spin-vector Langevin model
Language :	English
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) >]
Publication date :	2022
Journal title :	Physical Review Research
Peer reviewed :	Yes
Audience :	International
Abstract :	[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.
Permalink :	http://hdl.handle.net/10993/52152

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