Reduced-Scaling Coupled-Cluster Theory for Response Properties of Large Molecules

Abstract

The current state of locally correlated coupled cluster theory is reviewed, with an emphasis on recent developments applicable to response properties. The “correlation domain” selection schemes that have yielded great success for computations of ground-state energies are found to be inadequate for field-response properties, including polarizabilities, excitation energies, and transition probabilities. Alternative approaches for expanding the venerated Boughton—Pulay orbital domains are considered, including the use of the first-order orbital response via the coupled-perturbed Hartree—Fock equations. Applications of these selection schemes to frequency-dependent dipole-polarizabilities and optical rotation in chiral species demonstrate that local correlation methods have great promise for such properties for large molecules.