7 papers
Local fermion-to-qudit mappings: a practical recipe for four-level systems
Rodolfo Carobene, Stefano Barison, Andrea Giachero +1
In this paper, we present a new set of local fermion-to-qudit mappings for simulating fermionic lattice systems. We focus on the use of multi-level qudits, specifically ququarts. T…
Partial suppression of magnetism in the square lattice SU(3) Hubbard model
Samuel Bird, Sebastian Huber, Jannes Nys
The SU(N) Hubbard model is a natural extension of the SU(2) model. However, even the N=3 case remains poorly understood. We report a substantially new ground-state phase diagram of…
Precise Quantum Chemistry calculations with few Slater Determinants
Clemens Giuliani, Jannes Nys, Rocco Martinazzo +2
Slater determinants have underpinned quantum chemistry for nearly a century, yet their full potential has remained challenging to exploit. In this work, we show that a variational…
Spectroscopy of two-dimensional interacting lattice electrons using symmetry-aware neural backflow transformations
Imelda Romero, Jannes Nys, Giuseppe Carleo
Neural networks have shown to be a powerful tool to represent the ground state of quantum many-body systems, including fermionic systems. However, efficiently integrating lattice s…
Phase diagram and crystal melting of helium-4 in two dimensions
David Linteau, Gabriel Pescia, Jannes Nys +2
We study the zero-temperature phase diagram of two-dimensional helium-4 using neural quantum states. Our variational description allows us to address liquid and solid phases using…
Ab-initio variational wave functions for the time-dependent many-electron Schrödinger equation
Jannes Nys, Gabriel Pescia, Alessandro Sinibaldi +1
Understanding the real-time evolution of many-electron quantum systems is essential for studying dynamical properties in condensed matter, quantum chemistry, and complex materials,…