title: Attosecond two-photon interferometry for doubly excited states of helium.
abstract: We show that the correlation dynamics in coherently excited doubly excited resonances of helium can be followed in real time by two-photon interferometry. This approach promises to map the evolution of the two-electron wave packet onto experimentally easily accessible noncoincident single-electron spectra. We analyze the interferometric signal in terms of a semianalytical model which is validated by a numerical solution of the time-dependent two-electron Schrödinger equation in its full dimensionality.
authors.affiliation: ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA. jfeist@cfa.harvard.edu
authors.forename: J
authors.initials: J
authors.lastname: Feist
authors.forename: S
authors.initials: S
authors.lastname: Nagele
authors.forename: C
authors.initials: C
authors.lastname: Ticknor
authors.forename: B I
authors.initials: BI
authors.lastname: Schneider
authors.forename: L A
authors.initials: LA
authors.lastname: Collins
authors.forename: J
authors.initials: J
authors.lastname: Burgdörfer