Attosecond Two-Photon Interferometry for Doubly Excited States of Helium

J. Feist, S. Nagele, C. Ticknor, B. I. Schneider, L. A. Collins, and J. Burgdörfer

Phys. Rev. Lett. 107, 093005 – Published 26 August 2011

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.

Received 19 April 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.093005

Authors & Affiliations

J. Feist^1,*, S. Nagele^2,†, C. Ticknor³, B. I. Schneider⁴, L. A. Collins³, and J. Burgdörfer²

¹ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
²Institute for Theoretical Physics, Vienna University of Technology, 1040 Vienna, Austria, EU
³Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
⁴Office of Cyberinfrastructure, National Science Foundation, Arlington, Virginia 22230, USA