98 citations · 708 across the 33 of their papers we have counts for
16 papers · 1 filter
Matching Lagrangian and Hamiltonian Simulations in (2+1)-dimensional U(1) Gauge Theory
C. F. Groß, S. Romiti, L. Funcke +4
At finite lattice spacing, Lagrangian and Hamiltonian predictions differ due to discretization effects. In the Hamiltonian limit, i.e. at vanishing temporal lattice spacing ,…
Meson thermalization with a hot medium in the open Schwinger model
Takis Angelides, Yibin Guo, Karl Jansen +2
Quantum field theories treated as open quantum systems provide a crucial framework for studying realistic experimental scenarios, such as quarkonia traversing the quark-gluon plasm…
First-Order Phase Transition of the Schwinger Model with a Quantum Computer
Takis Angelides, Pranay Naredi, Arianna Crippa +4
We explore the first-order phase transition in the lattice Schwinger model in the presence of a topological -term by means of the variational quantum eigensolver (VQE). Using tw…
Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing
Stephan Schuster, Stefan Kühn, Lena Funcke +4
We propose an ansatz quantum circuit for the variational quantum eigensolver (VQE), suitable for exploring the phase structure of the multi-flavor Schwinger model in the presence o…
Computing the Mass Shift of Wilson and Staggered Fermions in the Lattice Schwinger Model with Matrix Product States
Takis Angelides, Lena Funcke, Karl Jansen +1
Simulations of lattice gauge theories with tensor networks and quantum computing have so far mainly focused on staggered fermions. In this paper, we use matrix product states to st…
Exploring the CP-violating Dashen phase in the Schwinger model with tensor networks
Lena Funcke, Karl Jansen, Stefan Kühn
We numerically study the phase structure of the two-flavor Schwinger model with matrix product states, focusing on the (1+1)-dimensional analog of the CP-violating Dashen phase in…
Review on Quantum Computing for Lattice Field Theory
Lena Funcke, Tobias Hartung, Karl Jansen +1
In these proceedings, we review recent advances in applying quantum computing to lattice field theory. Quantum computing offers the prospect to simulate lattice field theories in p…
Hamiltonian limit of lattice QED in 2+1 dimensions
L. Funcke, C. F. Groß, K. Jansen +3
The Hamiltonian limit of lattice gauge theories can be found by extrapolating the results of anisotropic lattice computations, i.e., computations using lattice actions with differe…
Mass Renormalization of the Schwinger Model with Wilson and Staggered Fermions in the Hamiltonian Lattice Formulation
Takis Angelides, Lena Funcke, Karl Jansen +1
Lattice computations in the Hamiltonian formulation have so far mainly focused on staggered fermions. In these proceedings, we study Wilson fermions in the Hamiltonian formulation…
3+1D -Term on the Lattice from the Hamiltonian Perspective
Angus Kan, Lena Funcke, Stefan Kühn +5
Quantum and tensor network simulations have emerged as prominent sign-problem free approaches to lattice gauge theories. Unlike conventional Markov chain Monte Carlo methods, they…
CP-violating Dashen phase transition in the two-flavor Schwinger model: a study with matrix product states
Lena Funcke, Karl Jansen, Stefan Kühn
We numerically study the Hamiltonian lattice formulation of the two-flavor Schwinger model using matrix product states. Keeping the mass of the first flavor at a fixed positive val…
Investigating a (3+1)D Topological -Term in the Hamiltonian Formulation of Lattice Gauge Theories for Quantum and Classical Simulations
Angus Kan, Lena Funcke, Stefan Kühn +5
Quantum technologies offer the prospect to efficiently simulate sign-problem afflicted regimes in lattice field theory, such as the presence of topological terms, chemical potentia…
Topological vacuum structure of the Schwinger model with matrix product states
Lena Funcke, Karl Jansen, Stefan Kühn
We numerically study the single-flavor Schwinger model with a topological -term, which is practically inaccessible by standard lattice Monte Carlo simulations due to the sign pr…
Tensor Networks and their use for Lattice Gauge Theories
Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac +2
Tensor Network States are ansätze for the efficient description of quantum many-body systems. Their success for one dimensional problems, together with the fact that they do not su…
Variational study of U(1) and SU(2) lattice gauge theories with Gaussian states in 1+1 dimensions
P. Sala, T. Shi, S. Kühn +3
We introduce a method to investigate the static and dynamic properties of both Abelian and non-Abelian lattice gauge models in 1+1 dimensions. Specifically, we identify a set of tr…
Efficient Basis Formulation for (1+1)-Dimensional SU(2) Lattice Gauge Theory: Spectral calculations with matrix product states
Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac +2
We propose an explicit formulation of the physical subspace for a (1+1)-dimensional SU(2) lattice gauge theory, where the gauge degrees of freedom are integrated out. Our formulati…