72 citations · 127 across the 2 of their papers we have counts for
3 papers
Variational coupled cluster for ground and excited states
Antoine Marie, Fábris Kossoski, Pierre-François Loos
In single-reference coupled-cluster (CC) methods, one has to solve a set of non-linear polynomial equations in order to determine the so-called amplitudes which are then used to co…
Excited States From State Specific Orbital Optimized Pair Coupled Cluster
Fábris Kossoski, Antoine Marie, Anthony Scemama +2
The pair coupled cluster doubles (pCCD) method (where the excitation manifold is restricted to electron pairs) has a series of interesting features. Among others, it provides groun…
Perturbation Theory in the Complex Plane: Exceptional Points and Where to Find Them
Antoine Marie, Hugh G. A. Burton, Pierre-François Loos
We explore the non-Hermitian extension of quantum chemistry in the complex plane and its link with perturbation theory. We observe that the physics of a quantum system is intimatel…