Non-perturbative lattice approaches to complex path integrals: from non-perturbative saddle points to real-time physics of chiral media

URN to cite this document:: urn:nbn:de:bvb:355-epub-381068
DOI to cite this document:: 10.5283/epub.38106

Valgushev, Semen

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Date of publication of this fulltext: 06 Dec 2018 12:17

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Item type:	Thesis of the University of Regensburg (PhD)
Open Access Type:	Primary Publication
Date:	6 December 2018
Referee:	Dr. Pavel Buividovich
Date of exam:	4 December 2018
Institutions:	Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer
Keywords:	Nonperturbative physics, lattice field theory, strongly interacting systems
Dewey Decimal Classification:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Yes
Item ID:	38106

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Abstract (English)

In this thesis we discuss novel techniques for studying non-perturbative physics of strongly coupled systems such as QCD-like asymptotically free models. The leitmotif of these studies is appreciation of important role of complex saddle points of path integrals. In this context we consider problems related to intimate resurgent relations of asymptotic perturbative expansions and non-perturbative physics, sign problem in lattice simulations and real-time physics of chiral plasmas.

Translation of the abstract (German)

In dieser Arbeit wird über neuartige Techniken zur Untersuchung der nicht perturbativen Physik von stark gekoppelten Systemen wie QCD-ähnlichen asymptotisch freien Modellen und Systemen der kondensierten Materie diskutiert. Das Leitmotiv dieser Studie ist die wichtige Rolle komplexer Sattelpunkte von Pfadintegralen hervorzuheben. In diesem Kontext werden Probleme betrachtet, die in Zusammenhang ...