Multireference response

In this section, we will describe how to use response theory to obtain excited state properties at the CI and MCSCF level.

• CI response
  A direct application of exact state response to full and truncated CI.

• State-averaged MCSCF
  A straightforward generalization of CI response to obtain excited state properties at the MCSCF level.

• Multiconfigurational linear response
  The full linear response for MCSCF wavefunctions.

• Exercises
  Applications of MCSCF to photochemistry and spectroscopy.