fter &quot;read data&quot; or &quot;read restart&quot; to
  change the style of Coulomb interactions or the cutoff
if simulated system has no charges, should set &quot;coulomb style none&quot; to
  prevent LAMMPS from doing useless nonbond work, LAMMPS will set
  this for you and issue a warning
cutoff distance can be smaller or larger than simulation box dimensions
accuracy criterion means &quot;one part in value&quot; - e.g. 1.0E-4
Ewald and PPPM accuracy criterion are used in conjunction with cutoff
  to