fieldforce_ik and fieldforce_ad. What's the difference?

Dear LMPS users,

I am trying to modified the pppm.cpp code to get some force. While, the function fieldforce_ik and fieldforce_ad confused me. Do you know the difference between them?

Thank you in advance for your help.

Yi

Dear LMPS users,

I am trying to modified the pppm.cpp code to get some force. While, the
function fieldforce_ik and fieldforce_ad confused me. Do you know the
difference between them?

the first is used with

kspace_modify diff ik

the second with

kspace_modify diff ad

see the manual for details

axel.