307 citations · 1.3k across the 22 of their papers we have counts for
7 papers · 1 filter
The Dicke model as the contraction limit of a pseudo-deformed Richardson-Gaudin model
Pieter W. Claeys, Stijn De Baerdemacker, Mario Van Raemdonck +1
The Dicke model is derived in the contraction limit of a pseudo-deformation of the quasispin algebra in the su(2)-based Richardson-Gaudin models. Likewise, the integrability of the…
The density matrix renormalization group for ab initio quantum chemistry
Sebastian Wouters, Dimitri Van Neck
During the past 15 years, the density matrix renormalization group (DMRG) has become increasingly important for ab initio quantum chemistry. Its underlying wavefunction ansatz, the…
Projected seniority-two orbital optimization of the Antisymmetric Product of one-reference orbital Geminal
Katharina Boguslawski, Paweł Tecmer, Peter A. Limacher +5
We present a new, non-variational orbital-optimization scheme for the Antisymmetric Product of one-reference orbital Geminal wave function. Our approach is motivated by the observa…
Projector quantum Monte Carlo with matrix product states
Sebastian Wouters, Brecht Verstichel, Dimitri Van Neck +1
We marry tensor network states (TNS) and projector quantum Monte Carlo (PMC) to overcome the high computational scaling of TNS and the sign problem of PMC. Using TNS as trial wavef…
Exact solution of the pairing Hamiltonian by deforming the pairing algebra
Mario Van Raemdonck, Stijn De Baerdemacker, Dimitri Van Neck
The present paper makes a connection between collective bosonic states and the exact solutions of the pairing Hamiltonian. This makes it possible to investigate the ef…
CheMPS2: a free open-source spin-adapted implementation of the density matrix renormalization group for ab initio quantum chemistry
Sebastian Wouters, Ward Poelmans, Paul W. Ayers +1
The density matrix renormalization group (DMRG) has become an indispensable numerical tool to find exact eigenstates of finite-size quantum systems with strong correlation. In the…