3 papers
math-ph2026
v-Representability on a one-dimensional torus at elevated temperatures
Sarina M. Sutter, Markus Penz, Michael Ruggenthaler +2
We extend a previous result [Sutter et al., J. Phys. A: Math. Theor. 57, 475202 (2024)] to give an explicit form of the set of -representable densities on the one-dimensional to…
cond-mat.mtrl-sci2025
Constrained Search in Imaginary Time
Markus Penz, Robert van Leeuwen
We introduce an imaginary-time evolution method to evaluate the pure-state constrained-search functional from density-functional theory formulated on finite lattices. Simultaneousl…
cond-mat.mtrl-sci2024
Geometrical Perspective on Spin-Lattice Density-Functional Theory
Markus Penz, Robert van Leeuwen
A recently developed viewpoint on the fundamentals of density-functional theory for finite interacting spin-lattice systems that centers around the notion of degeneracy regions is…