---
res:
  bibo_abstract:
  - We developed a method to calculate two-photon processes in quantum mechanics that
    replaces the infinite summation over the intermediate states by a perturbation
    expansion. This latter consists of a series of commutators that involve position,
    momentum, and Hamiltonian quantum operators. We analyzed several single- and many-particle
    cases for which a closed-form solution to the perturbation expansion exists, as
    well as more complicated cases for which a solution is found by convergence. Throughout
    the article, Rayleigh and Raman scattering are taken as examples of two-photon
    processes. The present method provides a clear distinction between the Thomson
    scattering, regarded as classical scattering, and quantum contributions. Such
    a distinction lets us derive general results concerning light scattering. Finally,
    possible extensions to the developed formalism are discussed.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Filippo
      foaf_name: Fratini, Filippo
      foaf_surname: Fratini
  - foaf_Person:
      foaf_givenName: Laleh
      foaf_name: Safari, Laleh
      foaf_surname: Safari
      foaf_workInfoHomepage: http://www.librecat.org/personId=3C325E5E-F248-11E8-B48F-1D18A9856A87
  - foaf_Person:
      foaf_givenName: Pedro
      foaf_name: Amaro, Pedro
      foaf_surname: Amaro
  - foaf_Person:
      foaf_givenName: José
      foaf_name: Santos, José
      foaf_surname: Santos
  bibo_doi: 10.1103/PhysRevA.97.043842
  bibo_issue: '4'
  bibo_volume: 97
  dct_date: 2018^xs_gYear
  dct_identifier:
  - UT:000430296800008
  dct_language: eng
  dct_publisher: American Physical Society@
  dct_title: Two-photon processes based on quantum commutators@
...