2 papers
cond-mat.str-el2024
Capturing spin fluctuations in CaCuO: QMC calculations with multi-determinant wave functions
Chun Yu Chow, William A. Wheeler, Lucas K. Wagner
We present an advanced quantum Monte Carlo (QMC) calculation of the ground state of undoped CaCuO. We extend the traditional single-determinant Slater-Jast…
cond-mat.str-el2018
Many-Body Electric Multipole Operators in Extended Systems
William A. Wheeler, Lucas K. Wagner, Taylor L. Hughes
The quantum mechanical position operators, and their products, are not well-defined in systems obeying periodic boundary conditions. Here we extend the work of Resta who developed…