Dual QED(3) at N (F)=1/2 is an interacting CFT in the infrared - Kölner UniversitätsPublikationsServer

Roscher, Dietrich, Torres, Emilio and Strack, Philipp ORCID: 0000-0002-7040-521X (2016). Dual QED(3) at N (F)=1/2 is an interacting CFT in the infrared. J. High Energy Phys. (11). NEW YORK: SPRINGER. ISSN 1029-8479

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DOI:10.1007/JHEP11(2016)017

Abstract

We study the fate of weakly coupled dual QED(3) in the infrared, that is, a single two-component Dirac fermion coupled to an emergent U(1) gauge field, but without Chern-Simons term. This theory has recently been proposed as a dual description of 2D surfaces of certain topological insulators. Using the renormalization group, we find that the interplay of gauge fluctuations with generated interactions in the four-fermi sector stabilizes an interacting conformal field theory (CFT) with finite four-fermi coupling in the infrared. The emergence of this CFT is due to cancellations in the beta-function of the four-fermi coupling special to N (F) = 1/2. We also quantify how a possible strong Dirac fermion duality between a free Dirac cone and dual QED(3) would constrain the universal constants of the topological current correlator of the latter.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Roscher, Dietrich	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Torres, Emilio	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Strack, Philipp	UNSPECIFIED	orcid.org/0000-0002-7040-521X	UNSPECIFIED