First-order Phase Transition in Three-dimensional QED with Chern--Simons Term

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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8 pages, LaTeX, final version, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.74.18

We have studied the chiral phase transition in three-dimensional QED in the presence of a Chern--Simons term for the gauge field. There exists a phase where the chiral symmetry is broken dynamically and we have determined the critical line for this symmetry breaking as a function of the effective coupling and the strength of the additional Chern--Simons term. In the presence of a Chern--Simons term, the chiral phase transition turns out to be first order, in sharp contrast to the phase transition in pure three-dimensional QED.

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