Two-Dimensional Stimulated Resonance Raman Spectroscopy of Molecules   with Broadband X-ray Pulses
  Expressions for the two-dimensional Stimulated x-ray Raman Spectroscopy (2D-SXRS) signal obtained using attosecond x-ray pulses are derived. The 1D- and 2D-SXRS signals are calculated for trans-N-methyl acetamide (NMA) with broad bandwidth (FWHM ~14.2eV, 181 as) pulses tuned to the oxygen and nitrogen K-edges. Crosspeaks in 2D signals reveal electronic Franck-Condon overlaps between valence orbitals and relaxed orbitals in the presence of the core hole. 
Jason D. Biggs, Yu Zhang, Daniel Healion, and Shaul Mukamel
physics.chem-ph physics.optics quant-ph