Impurity Susceptibilities

The ED_CHI_FUNCTIONS wraps the methods to evaluate the dynamical impurity response functions. Because these are often used as a proxy to test instability in some channel (e.g. spin, charge, etc.) the susceptibilities are accessible only for ed_mode = normal.

The main method in this module is called directly in the ED_MAIN Fortran API.

Spin channel

This module implements the calculations of impurity spin dynamical response functions

Charge channel

This module implements the calculations of impurity charge dynamical response functions

Pair channel

This module implements the calculations of impurity Cooper pair dynamical response functions

Exciton channel

This module implements the calculations of impurity excitonic dynamical response functions