[Pw_forum] units of psi in e-ph coupling matrix element

[Ajit Vallabhaneni]

Dr. Paolo,

            Sorry to bother you again on this. I am familiar with the equation (1) in that file. However, it is still not clear to me how does 'g' has the units of energy (eV or Ry). Is the wave function psi considered unitless ? 


Thanks
Ajit