Chiral Symmetry breaking in Three Dimensional QED

Abstract

Over the past few years three dimensional Quantum Electrodynamics (QED${}_3$) has attracted a lot of attention, because it may be an effective theory for the underdoped and non-superconducting region of the phase diagram of high $T_c$ cuprate compounds. We present results from lattice simulations of the non-compact version of the theory in order to address the issue of whether chiral symmetry is spontaneously broken when the number of fermion flavours $N_f$ is less than a critical value $N_{fc}$. Our results provide strong evidence that QED${}_3$ is chirally symmetric for $N_f\ge 1.5$, implying that a pseudogap phase separates the superconducting phase from the antiferromagnetic phase.

4 pages, 3 figures, presented at the 25th international conference on Low Temperature Physics, 6-13 August 2008, Amsterdam

References in corpus (1)

• Critical Flavor Number in the Three Dimensional Thirring Model