Dual simulation of the two-dimensional lattice U(1) gauge-Higgs model with a topological term

Autor:	Michael Müller-Preussker, Christof Gattringer, Thomas Kloiber
Rok vydání:	2015
Předmět:	Physics Nuclear and High Energy Physics Vacuum angle Lattice (order) Lattice gauge theory Monte Carlo method Lattice field theory Dual basis Higgs boson Partition (number theory) Topology
Zdroj:	Physical Review D. 92
ISSN:	1550-2368 1550-7998
DOI:	10.1103/physrevd.92.114508
Popis:	The 2-dimensional U(1) gauge-Higgs model with a topological term is a simple example of a lattice field theory where the complex action problem comes from the topological term. We show that the model can be exactly rewritten in terms of dual variables, such that the dual partition sum has only real and positive contributions. Using suitable algorithms the dual formulation allows for Monte Carlo simulations at arbitrary values of the vacuum angle. We demonstrate the feasibility of the dual simulation and study the continuum limit, as well as the phase diagram of the system.
Databáze:	OpenAIRE
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