211 citations · 482 across the 14 of their papers we have counts for
7 papers · 1 filter
Computing quantum entanglement with machine learning
Andrea Bulgarelli, Elia Cellini, Karl Jansen +5
Entanglement calculations in quantum field theories are extremely challenging and typically rely on the replica trick, where the problem is rephrased in a study of defects. We demo…
Fermion Discretization Effects in the Two-Flavor Lattice Schwinger Model: A Study with Matrix Product States
Tim Schwägerl, Karl Jansen, Stefan Kühn
We present a comprehensive tensor network study of staggered, Wilson, and twisted mass fermions in the Hamiltonian formulation, using the massive two-flavor Schwinger model as a be…
Small-scale Hamiltonian optimization of interpolating operators for Lagrangian lattice quantum field theory
Artur Avkhadiev, Lena Funcke, Karl Jansen +2
Lattice quantum field theory calculations may potentially combine the advantages of Hamiltonian formulations with the scalability and control of conventional Lagrangian frameworks.…
Towards determining the (2+1)-dimensional Quantum Electrodynamics running coupling with Monte Carlo and quantum computing methods
Arianna Crippa, Simone Romiti, Lena Funcke +4
In this paper, we examine a compact lattice gauge theory in dimensions and present a strategy for studying the running coupling and extracting the non-perturbative $…
Phase structure of the CP(1) model in the presence of a topological -term
Katsumasa Nakayama, Lena Funcke, Karl Jansen +2
We numerically study the phase structure of the CP(1) model in the presence of a topological -term, a regime afflicted by the sign problem for conventional lattice Monte Carlo s…
O(3) nonlinear sigma model in 1+1 dimensions with matrix product states
Falk Bruckmann, Karl Jansen, Stefan Kühn
We numerically study the spectral properties, the entanglement and the zero-temperature phase structure at nonvanishing chemical potential of the O(3) nonlinear sigma model. Using…
Towards overcoming the Monte Carlo sign problem with tensor networks
Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac +3
The study of lattice gauge theories with Monte Carlo simulations is hindered by the infamous sign problem that appears under certain circumstances, in particular at non-zero chemic…