Units in Force RMSD lcurve.out?

[TinacciL]

I do not find the information about the unit for the RMSD for Forces in the lcurve.out file.

Is it the RMSD for the whole system [eV/Å] or is normalised for the number of atoms [eV/Å/N]?

Thanks

[wanghan-iapcm]

Please refer to eq 1 in PRL 120, 143001 (2018)