Multidimensional coherent spectroscopy of correlated lattice systems

Abstract

Multidimensional coherent spectroscopy (MDCS) has been established in quantum chemistry as a powerful tool for studying the nonlinear response and nonequilibrium dynamics of molecular systems. More recently, the technique has also been applied to correlated electron materials, where the interplay of localized and itinerant states makes the interpretation of the spectra more challenging. Here we use the Keldysh contour representation of effective models and nonequilibrium dynamical mean field theory to systematically study the MDCS signals of prototypical correlated lattice systems. By analyzing the current induced by sequences of ultrashort laser pulses we demonstrate the usefulness of MDCS as a diagnostic tool for excitation pathways and coherent processes in correlated solids. We also show that this technique allows to extract detailed information on the nature and evolution of photo-excited nonequilibrium states.

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Cited by in corpus (5)

• Extracting Nonlinear Dynamical Response Functions from Time Evolution
• Two-dimensional coherent spectroscopy of disordered superconductors in the narrow-band and broad-band limits
• Momentum-resolved two-dimensional spectroscopy as a probe of nonlinear quantum field dynamics
• Two-dimensional THz spectroscopy in electronic systems: a many-body diagrammatic approach
• Long-time divergences in the nonlinear response of gapped one-dimensional many-particle systems