Analog Quantum Simulation of Non-Condon Effects in Molecular Spectroscopy

In this work, we present a linear optical implementation for analog quantum simulation of molecular vibronic spectra, incorporating the non-Condon scattering operation with quadratically small truncation error. Thus far, and digital algorithms achieving speedup have been suggested only in Condon regime, which refers to transition dipole moment that is independent nuclear coordinates. For beyond regime (i.e., transitions) resulting non-unitary operations must be handled appropriately network. paper, consider first second-order Herzberg-Teller expansions operator effect, on hardware. We believe method opens new way approximate arbitrary simulations. report in-silico simulations spectra naphthalene, phenanthrene, benzene support our findings.