Mapping of unoccupied states and relevant bosonic modes via the time-dependent momentum distribution

A. F. Kemper,1,2,* M. Sentef,2 B. Moritz,2,3,4 C. C. Kao,5 Z. X. Shen,2,6 J. K. Freericks,7 and T. P. Devereaux2,6 1Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA 2Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA 3Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA 4Department of Physics and Astrophysics, University of North Dakota, Grand Forks, North Dakota 58202, USA 5Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA 6Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA 7Department of Physics, Georgetown University, Washington, District of Columbia 20057, USA (Received 15 August 2012; published 28 June 2013)