In this talk I will discuss our recent effort to develop accurate and economic multireference approaches for the description of strongly correlated ground and excited states of large molecules.  I will introduce our multireference generalization of the driven similarity renormalization group (MR-DSRG) and discuss applications of low-order perturbative MR-DSRG methods based on approximate reference wave functions.

Perturbative multireference similarity renormalization group approaches for ground and excited states

253rd National Meeting (2017)

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