A short journey through state-specific multi-reference many body theories
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 10
Abstract
In many body theories a good state-specific (SS) method, starting with a multi-reference function, takes care of the non-dynamical correlation due to near-degeneracy, and targets a specific state of interest via a state-specific wave operator bringing in the dynamical correlation by a cluster expansion inducing excitation to the virtual functions. All such methods are generically called as state-specific multi-reference (SSMR) methods. The SSMR methods address the solution of specific states of interest one at a time and are thus free from the intruder state problem as long as the target state is well separated from the virtual one.
Authors and Affiliations
Dola Pahari
Keywords
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