We analyze the phase diagram of compact QED on the torus with a chirally symmetric four fermion interaction. Inside a mean field approximation for the four fermion term, a line of first order phase transitions and another one of second order are found in the $(\beta, G)$ plane. Approaching the second order line a continuum limit can be defined. Critical exponents vary along this line in a similar way as in the non-compact model, suggesting that a non-trivial interacting continuum theory can be constructed.

Continuous chiral transition in strongly coupled compact QED with the standard torus topology

Abstract

We analyze the phase diagram of compact QED on the torus with a chirally symmetric four fermion interaction. Inside a mean field approximation for the four fermion term, a line of first order phase transitions and another one of second order are found in the $(\beta, G)$ plane. Approaching the second order line a continuum limit can be defined. Critical exponents vary along this line in a similar way as in the non-compact model, suggesting that a non-trivial interacting continuum theory can be constructed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/11178
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