A Unified Treatment of Energy Derivatives and Non-Adiabatic Coupling Matrix Elements
Abstract
A vectorizable second order MCSCF method is first outlined and then shown to yield a unified framework from which to develop MCSCF and multi- reference CI energy derivatives. Non-adiabatic coupling matrix elements can be extracted from this framework by using a common orbital set to describe both states. CI non-adiabatic coupling matrix elements are simply obtained by employing transition density matrices in the multi-reference CI gradient program.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA171388
Entities
People
- Byron H. Lengsfield Iii
Organizations
- Ballistic Research Laboratory