Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-11-11
Europhys.Lett. 68 (2004) 198
Physics
Condensed Matter
Strongly Correlated Electrons
RevTex4, 4 pages, 1 figure; v3: improvements and corrections made in the first part of the paper; references added. To be publ
Scientific paper
10.1209/epl/i2004-10192-7
We study the effect of a Chern-Simons (CS) term in the phase structure of two different Abelian gauge theories. For the compact Maxwell-Chern-Simons theory, we obtain that for values $g=n/2\pi$ of the CS coupling with $n=\pm 1,\pm 2$, the theory is equivalent to a gas of closed loops with contact interaction, exhibiting a phase transition in the $3dXY$ universality class. We also employ Monte Carlo simulations to study the noncompact U(1) Abelian Higgs model with a CS term. Finite size scaling of the third moment of the action yields critical exponents $\alpha$ and $\nu$ that vary continuously with the strength of the CS term, and a comparison with available analytical results is made.
Nogueira Flavio S.
Smiseth J.
Smorgrav E.
Sudbo Asle
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