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

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Zeitschrift für Physik C Particles and Fields

Abstract

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(δ 2) the line of first-order phase transitions is shown to terminate, and atO(δ 3) the boundaries between the different phases are well reproduced.

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Akeyo, J.O., Jones, H.F. Optimization in the extended variational approach: TheSU(2)-SO(3) phase structure on the lattice. Z. Phys. C - Particles and Fields 58, 629–635 (1993). https://doi.org/10.1007/BF01553023

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  • DOI: https://doi.org/10.1007/BF01553023

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