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- Title
CHARGE SCREENING IN THE FINITE TEMPERATURE SCHWINGER MODEL.
- Authors
GRIGNANI, G.; SODANO, P.; SEMENOFF, G.; TIRKKONEN, O.
- Abstract
We compute the effective action and correlators of the Polyakov loop operator in the Schwinger model at finite temperature and discuss the realization of the discrete symmetries that occur there. We show that, due to nonlocal effects of massless fermions in two space-time dimensions, the discrete symmetry which governs the screening of charges is spontaneously broken even in an effective one-dimensional model, when the volume is infinite. In this limit, the thermal state of the Schwinger model screens an arbitrary external charge; consequently the model is in the deconfined phase, with the charge of the deconfined fermions completely screened. In a finite volume we show that the Schwinger model is always confining.
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 1996, Vol 11, Issue 22, p4103
- ISSN
0217-751X
- Publication type
Article
- DOI
10.1142/S0217751X96001930