3 papers
math-ph2026
Unified Framework for Functional Theories of Quantum Systems
Chih-Chun Wang, Julia Liebert, Markus Penz +1
We introduce and study a unified framework for density-functional theory and its variants for quantum systems on finite-dimensional Hilbert spaces. These theories seek to reduce th…
quant-ph2026
Geometry of Generalized Density Functional Theories
Chih-Chun Wang
Density functional theory (DFT) is an indispensable ab initio method in both quantum chemistry and condensed matter physics. Based on recent advancements in reduced density matrix…
quant-ph2026
A Geometric Approach to Strongly Correlated Bosons: From -Representability to the Generalized BEC Force
Chih-Chun Wang, Christian Schilling
Building on recent advances in reduced density matrix theory, we develop a geometric framework for describing strongly correlated lattice bosons. We first establish that translatio…