  An analytical benchmark is proposed for graphene and carbon nanotubes, that
may serve to test whatsoever molecular dynamics code implemented with REBO
potentials. By exploiting the benchmark, we checked results produced by LAMMPS
(Large-scale Atomic/Molecular Massively Parallel Simulator) when adopting the
second generation Brenner potential, we made evident that the code in its
current implementation produces results which are offset from those of the
benchmark by a significant amount, and provide evidence of the reason.
