Tilted-Plane Structure of the Energy of Finite Quantum Systems

AC Burgess, E Linscott, DD O'Regan - Physical Review Letters, 2024 - APS
The piecewise linearity condition on the total energy with respect to the total magnetization
of finite quantum systems is derived using the infinite-separation-limit technique. This …

Extending Conceptual Density Functional Theory toward First-Order Reduced Density Matrices: An Open Subsystems Viewpoint on the Fukui Matrix

G Acke, D Van Hende, X De Vriendt… - Journal of Chemical …, 2023 - ACS Publications
As a matrix extension of the Fukui function, a reactivity descriptor grounded within
Conceptual Density Functional Theory, the Fukui matrix extends Frontier Molecular Orbital …

Uncovering phase transitions that underpin the flat-planes in the tilted Hubbard model using subsystems and entanglement measures

X De Vriendt, D Van Hende… - The Journal of …, 2022 - pubs.aip.org
The failure of many approximate electronic structure methods can be traced to their
erroneous description of fractional charge and spin redistributions in the asymptotic limit …

Flat plane based double-counting free and parameter free many-body

AC Burgess, DD O'Regan - Physical Review B, 2024 - APS
The recently introduced BLOR corrective exchange-correlation functional [AC Burgess,
Phys. Rev. B 107, L121115 (2023) 10.1103/PhysRevB. 107. L121115] is, by construction …

The tilted-plane structure of the energy of open quantum systems

AC Burgess, E Linscott, DD O'Regan - arxiv preprint arxiv:2307.16003, 2023 - arxiv.org
The piecewise linearity condition on the total energy with respect to total magnetization of
open quantum systems is derived, using the infinite-separation-limit technique. This …

Analyzing the behavior of spin phases in external magnetic fields by means of spin-constrained states

L Lemmens, X De Vriendt, P Bultinck… - Journal of Chemical …, 2022 - ACS Publications
During molecular dissociation in the presence of an external uniform magnetic field,
electrons flip their spin antiparallel to the magnetic field because of the stabilizing influence …

Capturing correlation in the spin frustrated H3-ring using the generator coordinate method and spin-constrained generalised Hartree-Fock states

X De Vriendt, J De Vos, S De Baerdemacker… - Molecular …, 2023 - Taylor & Francis
In spin frustrated H 3-rings, variationally minimal single Slater determinant descriptions
break S^ 2 and S^ z symmetries in an effort to simultaneously minimise the interactions …

[PDF][PDF] Capturing correlation in the spin frustrated H

X De Vriendta, J De Vosa, S De Baerdemackerb… - backoffice.biblio.ugent.be
In spin frustrated H3-rings, variationally minimal single Slater determinant descriptions break
ˆS2 and ˆSz symmetries in an effort to simultaneously minimize the interactions between all …

[CITATION][C] Design, implementation and application of a semantic computational toolbox for novel electronic structure method development

L Lemmens - 2022 - biblio.ugent.be
Design, implementation and application of a semantic computational toolbox for novel electronic
structure method development Universiteit Gent Add publications and datasets Lists Sign in …