We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleQuantum Monte Carlo for electronic excitations of free-base porphyrin.AuthorsAspuru-Guzik, Alán; El Akramine, Ouafae; Grossman, Jeffrey C.; Lester Jr., William A.PublicationJournal of Chemical Physics, 2004, Vol 120, Issue 7, p3049ISSN0021-9606Publication typearticleDOI10.1063/1.1646356