148 citations · 668 across the 22 of their papers we have counts for
5 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…
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…
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…
Efficient description of strongly correlated electrons with mean-field cost
Katharina Boguslawski, Paweł Tecmer, Paul W. Ayers +3
We present an efficient approach to the electron correlation problem that is well-suited for strongly interacting many-body systems, but requires only mean-field-like computational…
Scaling a unitary matrix
Alexis De Vos, Stijn De Baerdemacker
The iterative method of Sinkhorn allows, starting from an arbitrary real matrix with non-negative entries, to find a so-called 'scaled matrix' which is doubly stochastic, i.e. a ma…