Source code for PIMD for bosons within LAMMPS. (fix_pimdb.cpp and fix_pimdb.h). Input files for all simulations at bhw=6. For other temperatures, simply change the Temp variable accordingly. Raw data ('.dat' pickle files) for arXiv:1905.09053, published in https://doi.org/10.1073/pnas.1913365116, is also given with python scripts to generate figures. I thank P. Mujal for the raw data from Physical Review A 96, 043614 (2017) (not given here).