Table 1. Main observables (with the appropriate dimensions) in Lennard Jones units, together with typical associated values in SI units for the mimicked real system.

Observable	Dimensions	LJ units	SI units
Length	L	a	0.3 nm
Mass	M	m	1.6 × 10−25 kg
Energy	E	ε	2.74 × 10−21 J
Temperature (Tp)	T	3/2ε	300 K
Force	E/L	ε/a	9.1 pN
Time			2.3 ps
Friction	L3/ET	ξ	7.6 × 10−9 m3(JK)−1

Note that k_B = 1 in LJ units.