New algorithms and new results for strong coupling LQCD

  • We present and compare new types of algorithms for lattice QCD with staggered fermions in the limit of infinite gauge coupling. These algorithms are formulated on a discrete spatial lattice but with continuous Euclidean time. They make use of the exact Hamiltonian, with the inverse temperature beta as the only input parameter. This formulation turns out to be analogous to that of a quantum spin system. The sign problem is completely absent, at zero and non-zero baryon density. We compare the performance of a continuous-time worm algorithm and of a Stochastic Series Expansion algorithm (SSE), which operates on equivalence classes of time-ordered interactions. Finally, we apply the SSE algorithm to a first exploratory study of two-flavor strong coupling lattice QCD, which is manageable in the Hamiltonian formulation because the sign problem can be controlled.

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Metadaten
Author:Wolfgang UngerORCiDGND, Philippe de ForcrandGND
URN:urn:nbn:de:hebis:30:3-274453
ISSN:1824-8039
ArXiv Id:http://arxiv.org/abs/1211.7322
Parent Title (English):Proceedings of Science
Publisher:Scuola Internazionale Superiore di Studi Avanzati
Place of publication:Trieste
Document Type:Conference Proceeding
Language:English
Year of Completion:2012
Year of first Publication:2012
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2012/12/14
Volume:2012
First Page:1
Note:
The 30 International Symposium on Lattice Field Theory - Lattice 2012, June 24-29, 2012 Cairns, Australia
HeBIS-PPN:416425305
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen