Hello QE users and developers, in the PAW scheme, there's a step to calculate wave-function characters at a given k-point, i.e. <p_tilde (k) | psi_tilde(k)>. However, projectors (p_tilde) are given in real-space in UPF files whereas the smooth wave-functions are expanded in G(reciprocal)-space. Could someone tell me how and in what subroutine(s) this wave-function character is calculated in Espresso? Also, is there any interpolation method used in this calculation?
Thank you! Ryky Nelson Institut für Anorganische Chemie RWTH Aachen University
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