Reweighting Lefschetz thimbles

• Verfasst von: Blücher, Stefan [VerfasserIn]
• Verfasst von: Pawlowski, Jan M. [VerfasserIn]
• Verfasst von: Scherzer, Manuel [VerfasserIn]
• Verfasst von: Stamatescu, Ion-Olimpiu [VerfasserIn]
• Verfasst von: Ziegler, Felix P. G. [VerfasserIn]
• Verfasst von: Schlosser, Mike [VerfasserIn]
• Verfasst von: Syrkowski, Sebastian [VerfasserIn]
• Titel: Reweighting Lefschetz thimbles
• Verf.angabe: Stefan Blücher, Jan M. Pawlowski, Manuel Scherzer, Mike Schlosser, Ion-Olimpiu Stamatescu, Sebastian Syrkowski, and Felix P.G. Ziegler
• E-Jahr: 2018
• Jahr: 4 Oct 2018
• Umfang: 11 S.
• Fussnoten: Gesehen am 03.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1803.08418, 11 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: High Energy Physics - Theory
• Sach-SW: High Energy Physics - Lattice
• K10plus-PPN: 1585709603

Abstract

One of the main challenges in simulations on Lefschetz thimbles is the computation of the relative weights of contributing thimbles. In this paper we propose a solution to that problem by means of computing those weights using a reweighting procedure. Besides we present recipes for finding parametrizations of thimbles and anti-thimbles for a given theory. Moreover, we study some approaches to combine the Lefschetz thimble method with the Complex Langevin evolution. Our numerical investigations are carried out by using toy models among which we consider a one-site z^4 model as well as a U(1) one-link model.