24 citations · 58 across the 7 of their papers we have counts for
7 papers
Static self energy and effective mass of the homogeneous electron gas from Quantum Monte Carlo calculations
Markus Holzmann, Francesco Calcavecchia, David M. Ceperley +1
We discuss the methodology of quantum Monte Carlo calculations of the effective mass based on the static self energy, . We then use variational Monte Carlo calculations of…
Artificial Neural Networks as Trial Wave Functions for Quantum Monte Carlo
Jan Kessler, Francesco Calcavecchia, Thomas D. Kühne
Inspired by the universal approximation theorem and widespread adoption of artificial neural network techniques in a diversity of fields, we propose feed-forward neural networks as…
Two-Dimensional Hydrogen Structure at Ultra-High Pressure
Francesco Calcavecchia, Thomas D. Kühne, Markus Holzmann
We introduce a novel method that combines the accuracy of Quantum Monte Carlo simulations with ab-initio Molecular Dynamics, in the spirit of Car-Parrinello. This method is then us…
Metal-Insulator Transition of Solid Hydrogen by the Antisymmetric Shadow Wave Function
Francesco Calcavecchia, Thomas D. Kühne
We revisit the pressure-induced metal-insulator-transition of solid hydrogen by means of variational quantum Monte Carlo simulations based on the antisymmetric shadow wave function…
On the Fermion Sign Problem in Imaginary-Time Projection Continuum Quantum Monte Carlo with Local Interaction
Francesco Calcavecchia, Markus Holzmann
We use the Shadow Wave Function formalism as a convenient model to study the fermion sign problem affecting all projector Quantum Monte Carlo methods in continuum space. We demonst…
On Fermionic Shadow Wave Functions for strongly-correlated multi-reference systems based on a single Slater determinant
F. Calcavecchia, T. D. Kühne
We demonstrate that extending the Shadow Wave Function to fermionic systems facilitates to accurately calculate strongly-correlated multi-reference systems such as the stretched H2…
On the Sign Problem of the Fermionic Shadow Wave Function
Francesco Calcavecchia, Francesco Pederiva, Malvin H. Kalos +1
We present a whole series of novel methods to alleviate the sign problem of the Fermionic Shadow Wave Function in the context of Variational Monte Carlo. The effectiveness of our n…