Optimization in the extended variational approach: TheSU(2)-SO(3) phase structure on the lattice

Autor:	H. F. Jones, J. O. Akeyo
Rok vydání:	1993
Předmět:	Physics Phase transition Hamiltonian lattice gauge theory Variational method Physics and Astronomy (miscellaneous) Mean field theory Lattice gauge theory Lattice (order) Quantum electrodynamics Lattice field theory Engineering (miscellaneous) Mathematical physics Rotation group SO
Zdroj:	Zeitschrift f�r Physik C Particles and Fields. 58:629-635
ISSN:	1434-6052 0170-9739
DOI:	10.1007/bf01553023
Popis:	We use the linear delta expansion with a trial action based on single links to explore the phase structure of the mixedSU(2)-SO(3) lattice gauge theory. The method can be regarded as a systematic expansion going beyond mean field theory or the variational method, to which it is closely related in first order. AtO(δ2) the line of first-order phase transitions is shown to terminate, and atO(δ3) the boundaries between the different phases are well reproduced.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::64fd0f1f4b35f610875893c1b7c393f6 https://doi.org/10.1007/bf01553023 Zobrazit plný text záznamu Full text from SpringerLink