An Introduction to Coupled Cluster Theory for Computational Chemists

By T. D. Crawford, H. Schaefer. 2007

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On manifolds of tensors of fixed TT-rank (2012, background): “[8, 43], and this notation will also be introduced in this section.”
State‐specific multireference coupled‐cluster theory (2013, methodology): “132 This mainly helps to capture a larger portion of the dynamical correlation for the separated systems and should be contrasted with the fact that a CAS(2,2) reference provides a valid zeroth-order description throughout the reaction path.”
Psi4: an open‐source ab initio electronic structure program (2012, methodology): “…and doubles (CCSD) method, CCSD plus noniterative perturbative triples [CCSD(T)], and CC3 (energies only) in which triples are included iteratively, 3,4,23 all with both spin-restricted and spin-unrestricted HF references [as well as Brueckner references for CCSD and FIGURE 2 | Proﬂavine@DNA…”
A massively parallel tensor contraction framework for coupled-cluster computations (2014, methodology): “3 Coupled-cluster Methods Coupled-cluster [54, 5, 11] is an iterative process, where in each iteration, the new set of amplitudes T′ is computed from the amplitudes from the previous iteration T and from the (fixed) Hamiltonian H = F + V.”