166 citations · 1.1k across the 22 of their papers we have counts for
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Connection between and Extended Coupled Cluster
Johannes Tölle, Marios-Petros Kitsaras, Andreas Irmler +2
Coupled-cluster (CC) theory and Green's function many-body perturbation theory (MBPT) have long evolved as distinct yet complementary frameworks for describing electronic correlati…
Understanding Discrepancies of Wavefunction Theories for Large Molecules
Tobias Schäfer, Andreas Irmler, Alejandro Gallo +1
Quantum mechanical many-electron calculations can predict properties of atoms, molecules and even complex materials. The employed computational methods play a quintessential role i…
Phaseless auxiliary field quantum Monte Carlo with projector-augmented wave method for solids
Amir Taheridehkordi, Martin Schlipf, Zoran Sukurma +3
We implement the phaseless auxiliary field quantum Monte Carlo method using the plane-wave based projector augmented wave method and explore the accuracy and the feasibility of app…
Coupled cluster theory for the ground and excited states of two dimensional quantum dots
Faruk Salihbegović, Alejandro Gallo, Andreas Grüneis
We present a study of the two dimensional circular quantum dot model Hamiltonian using a range of quantum chemical ab initio methods. Ground and excited state energies are computed…
Surface science using coupled cluster theory via local Wannier functions and in-RPA-embedding: the case of water on graphitic carbon nitride
Tobias Schäfer, Alejandro Gallo, Andreas Irmler +2
A first-principles study of the adsorption of a single water molecule on a layer of graphitic carbon nitride employing an embedding approach is presented. The embedding approach in…
A comparison between quantum chemistry and quantum Monte Carlo techniques for the adsorption of water on the (001) LiH surface
Theodoros Tsatsoulis, Felix Hummel, Denis Usvyat +7
We present a comprehensive benchmark study of the adsorption energy of a single water molecule on the (001) LiH surface using periodic coupled cluster and quantum Monte Carlo theor…
Low rank factorization of the Coulomb integrals for periodic coupled cluster theory
Felix Hummel, Theodoros Tsatsoulis, Andreas Grüneis
We study the decomposition of the Coulomb integrals of periodic systems into a tensor contraction of six matrices of which only two are distinct. We find that the Coulomb integrals…
Many-body quantum chemistry for the electron gas: convergent perturbative theories
James J. Shepherd, Andreas Grüneis
We investigate the accuracy of a number of wavefunction based methods at the heart of quantum chemistry for metallic systems. Using Hartree-Fock as a reference, perturbative (Mølle…