[lammps-users] Gaussian white noise

Dear LAMMPS users,

It is noted in the manual that uniform random number distribution is used for stochastic term in fix langevin.
Is this correct?
Is there any way to apply Gaussian white noise instead?


Hello Zahra,

Yes, if that is an issue for your simulations I suggest using fix Langevin with gjf vhalf. (It performs Langevin intregation and has gaussian noise.)

Another good thermostat to use is fix temp/csvr, this thermostat is stochastic and also uses gaussian noise.


I’m not remembering the details, but if you read the Dunweg paper (cited on fix langevin doc page),
I believe the way it uses uniform random #s is a shortcut to Gaussian like behavior.