[CP2K-user] [CP2K:21668] NPT_F stress tensor calculation

James james.mcqueen at gmail.com
Thu Jul 17 15:34:44 UTC 2025


Hello,

I am trying to train a machine learning interatomic potential on NPT_F 
trajectory data generated in CP2K. The training is performed on the 
trajectory positions, energy, forces, and stress.

My question is, what does the stress output from NPT_F in CP2K depend on? 
Would I be able to take a frame of a trajectory generated from my machine 
learning interatomic potential, and perform a single point calculation in 
CP2K, and make a valid comparison between the values of stress given by the 
two systems? Or does the stress given by CP2K NPT_F depend on other factors 
like temperature and velocities which may invalidate this comparison?

Thanks
James

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