This guide covers the usage of the PHonon package for linear-response calculations.
It is also assumed that you know the physics behind QUANTUM ESPRESSO, the methods it implements, and in particular the physics and the methods of PHonon. It also assumes that you have already installed, or know how to install, QUANTUM ESPRESSO. If not, please read the general User's Guide for QUANTUM ESPRESSO, found in subdirectory Doc/ of the main QUANTUM ESPRESSO directory, or consult the web site http://www.quantum-espresso.org.
Further documentation, beyond what is provided in this guide, can be found in the directory PHonon/Doc/, containing a copy of this guide. People who want to contribute to QUANTUM ESPRESSO should read the Wiki pages on GitLab: https://gitlab.com/QEF/q-e/-/wikis.