Our paper, discussed in details here: https://mkschmidtphysics.blog/2023/06/28/preprint-on-anharmonic-effects-in-molecular-optomechanics-on-arxiv/
is now published in New J. Phys. 26 033041 (2024) (open source).
Work on anharmonic molecular optomechanics published in the New Journal of Physics
Mikołaj K. Schmidt 