skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices
Tipo de recurso Mostra resultados com: Mostra resultados com: Índice

Second-order perturbation theory in continuum quantum Monte Carlo calculations

Curry, Ryan ; Lynn, Joel E. ; Schmidt, Kevin E. ; Gezerlis, Alexandros

Physical review research, 2023-11, Vol.5 (4), p.L042021, Article L042021 [Periódico revisado por pares]

American Physical Society

Texto completo disponível

Citações Citado por
  • Título:
    Second-order perturbation theory in continuum quantum Monte Carlo calculations
  • Autor: Curry, Ryan ; Lynn, Joel E. ; Schmidt, Kevin E. ; Gezerlis, Alexandros
  • É parte de: Physical review research, 2023-11, Vol.5 (4), p.L042021, Article L042021
  • Descrição: We report on the first results for the second-order perturbation theory correction to the ground-state energy of a nuclear many-body system in a continuum quantum Monte Carlo calculation. Second-order (and higher) perturbative corrections are notoriously difficult to compute in most ab initio many-body methods, where the focus is usually on obtaining the ground-state energy. By mapping our calculation of the second-order energy correction to an evolution in imaginary time using the diffusion Monte Carlo method, we are able to calculate these nuclear corrections for the first time. After benchmarking our method in the few-body sector, we explore the effect of charge-independence-breaking terms in the nuclear Hamiltonian. We then employ that approach to investigate the many-body, perturbative, order-by-order convergence that is fundamental in modern theories of the nucleon-nucleon interaction derived from chiral effective field theory. We find cutoff-dependent perturbativeness between potentials at higher chiral order and also that the difference between leading order and next-to-leading order potentials is nonperturbative; both of these results have important implications for future nuclear many-body calculations. Our approach is quite general and promises to be of wide applicability.
  • Editor: American Physical Society
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  3 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.