Multiple Davydov trial states are shown to reproduce hierarchy-equation exciton dynamics for diagonal coupling and are used to compute the first 2D spectra for off-diagonal exciton-phonon coupling, whose strong-coupling signal is a vibronic multi-peak structure.
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Fast, accurate simulation of polaron dynamics and multidimensional spectroscopy by multiple Davydov trial states
Multiple Davydov trial states are shown to reproduce hierarchy-equation exciton dynamics for diagonal coupling and are used to compute the first 2D spectra for off-diagonal exciton-phonon coupling, whose strong-coupling signal is a vibronic multi-peak structure.