Deconfinement transition in three-dimensional compact U(1) gauge theories coupled to matter fields |
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Authors: | Kleinert Hagen Nogueira Flavio S Sudbø Asle |
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Institution: | Institut für Theoretische Physik, Freie Universit?t Berlin, Arnimallee 14, D-14195 Berlin, Germany. kleinert@physik.fu-berlin.de |
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Abstract: | It is shown that permanent confinement in three-dimensional compact U(1) gauge theory can be destroyed by matter fields in a deconfinement transition. This follows from a nontrivial infrared fixed point caused by matter, and an anomalous scaling dimension of the gauge field. This leads to a logarithmic interaction between the defects of the gauge fields, which form a gas of magnetic monopoles. For logarithmic interactions, the original electric charges are unconfined. The confined phase, which is permanent in the absence of matter fields, is reached at a critical electric charge, where the interaction between magnetic charges is screened by a pair-unbinding in a Kosterlitz-Thouless-like phase transition. |
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