Assessing the performance of quantum annealing with nonlinear driving

Autor(es)

Soriani, Artur ; Naze, Pierre ; Bonanca, Marcus V. S. ; Gardas, Bartlomiej ; Deffner, Sebastian

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW A; v. 105, n. 5, p. 9-pg., 2022-05-27.

Resumo

Current-generation quantum annealers have already proven to be successful problem solvers. Yet quantum annealing is still very much in its infancy, with suboptimal applicability. For instance, to date it is still an open question which annealing protocol causes the fewest diabatic excitations for a given eigenspectrum, and even whether there is a universally optimal strategy. Therefore, in this paper, we report analytical and numerical studies of the diabatic excitations arising from nonlinear protocols applied to the transverse field Ising chain, the exactly solvable model that serves as a quantum annealing playground. Our analysis focuses on several driving schemes that inhibit or facilitate the dynamic phases discussed in a previous work. Rather remarkably, we find that the paradigmatic Kibble-Zurek behavior can be suppressed with ???pauses??? in the evolution, both for crossing and for stopping at the quantum critical point of the system. (AU)

• Processo FAPESP: 18/21285-7 - Otimização do trabalho termodinâmico com machine learning control
• Beneficiário: Pierre Marie Antoine Leite Nazé
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 18/06365-4 - Otimização do trabalho termodinâmico em sistemas fora do equilíbrio
• Beneficiário: Pierre Marie Antoine Leite Nazé
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/02170-4 - Processo termodinâmicos ótimos em sistemas fora do equilíbrio
• Beneficiário: Marcus Vinicius Segantini Bonança
• Modalidade de apoio: Auxílio à Pesquisa - Regular