Fig. 1: A squeezed vacuum state and a linear photonic network for molecular vibronic spectroscopy.
From: Large-scale photonic network with squeezed vacuum states for molecular vibronic spectroscopy

a Molecular structure. b A vibronic transition of a molecule includes displacement, squeezing and rotation operations. c In our algorithm, by extending m vibronic modes to 2 m optical modes and applying straightforward rotation and squeezing operations, it is sufficient to reproduce vibronic spectra. d Photonic quantum circuit model, by translating the Doktorov operator to squeezing operators \(\hat{S}\left(r\right)\) and rotation operator \({\hat{R}}_{V}\). Output photon sampling distribution followed by post-processing can generate the vibronic spectroscopy of the molecule.