Search Results for author: Jan M. Pawlowski

Found 12 papers, 3 papers with code

Flow-based density of states for complex actions

no code implementations2 Mar 2022 Jan M. Pawlowski, Julian M. Urban

In this proof-of-principle study, we demonstrate our method in the context of two-component scalar field theory where the $O(2)$ symmetry is explicitly broken by an imaginary external field.

Numerical Integration

Functional renormalization group and 2PI effective action formalism

no code implementations26 Feb 2021 Jean-Paul Blaizot, Jan M. Pawlowski, Urko Reinosa

In particular, we exploit the exact 2PI relations between the two-point and four-point functions in order to truncate the infinite hierarchy of equations of the functional renormalization group.

High Energy Physics - Theory Other Condensed Matter Strongly Correlated Electrons High Energy Physics - Phenomenology

Fully coupled functional equations for the quark sector of QCD

no code implementations25 Feb 2021 Fei Gao, Joannis Papavassiliou, Jan M. Pawlowski

The components of the quark propagator obtained from our approach are in excellent agreement with the results from Schwinger-Dyson equations, the functional renormalisation group, and lattice QCD simulation, a simple benchmark observable being the chiral condensate in the chiral limit, which is computed as $(245\,\textrm{MeV})^3$.

High Energy Physics - Phenomenology High Energy Physics - Lattice High Energy Physics - Theory Nuclear Theory

QMeS-Derivation: Mathematica package for the symbolic derivation of functional equations

1 code implementation2 Feb 2021 Jan M. Pawlowski, Coralie S. Schneider, Nicolas Wink

We present the Mathematica package QMeS-Derivation.

High Energy Physics - Phenomenology High Energy Physics - Theory Computational Physics

Shocks and quark-meson scatterings at large density

no code implementations2 Feb 2021 Eduardo Grossi, Friederike J. Ihssen, Jan M. Pawlowski, Nicolas Wink

We discuss the phase structure of the two-flavour quark-meson model including quantum, thermal, density and critical fluctuations with the functional renormalisation group.

High Energy Physics - Phenomenology High Energy Physics - Theory

Simulating Yang-Mills theories with a complex coupling

no code implementations11 Jan 2021 Jan M. Pawlowski, Manuel Scherzer, Christian Schmidt, Felix P. G. Ziegler, Felix Ziesché

We discuss the structure of Generalized Lefschetz thimbles for pure Yang-Mills theories with a complex gauge coupling $\beta$ and show how to incorporate the gauge orbits.

High Energy Physics - Lattice High Energy Physics - Phenomenology

Towards Novel Insights in Lattice Field Theory with Explainable Machine Learning

no code implementations3 Mar 2020 Stefan Bluecher, Lukas Kades, Jan M. Pawlowski, Nils Strodthoff, Julian M. Urban

Machine learning has the potential to aid our understanding of phase structures in lattice quantum field theories through the statistical analysis of Monte Carlo samples.

BIG-bench Machine Learning Representation Learning

Spectral Reconstruction with Deep Neural Networks

no code implementations10 May 2019 Lukas Kades, Jan M. Pawlowski, Alexander Rothkopf, Manuel Scherzer, Julian M. Urban, Sebastian J. Wetzel, Nicolas Wink, Felix P. G. Ziegler

We explore artificial neural networks as a tool for the reconstruction of spectral functions from imaginary time Green's functions, a classic ill-conditioned inverse problem.

Bayesian Inference Spectral Reconstruction

The Discrete Langevin Machine: Bridging the Gap Between Thermodynamic and Neuromorphic Systems

no code implementations16 Jan 2019 Lukas Kades, Jan M. Pawlowski

A formulation of Langevin dynamics for discrete systems is derived as a class of generic stochastic processes.

Reducing Autocorrelation Times in Lattice Simulations with Generative Adversarial Networks

1 code implementation8 Nov 2018 Julian M. Urban, Jan M. Pawlowski

Short autocorrelation times are essential for a reliable error assessment in Monte Carlo simulations of lattice systems.

High Energy Physics - Lattice Computational Physics

Cooling Stochastic Quantization with colored noise

1 code implementation17 May 2017 Jan M. Pawlowski, Ion-Olimpiu Stamatescu, Felix P. G. Ziegler

We show, that UV modes can be removed systematically without altering the physics content of the theory.

High Energy Physics - Lattice High Energy Physics - Phenomenology High Energy Physics - Theory

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