Chiral Symmetry breaking in Three Dimensional QED

Details Chiral Symmetry breaking in Three Dimensional QED Chiral Symmetry breaking in Three Dimensional QED

2008-08-20

arxiv.org/abs/0808.2714v1

J.Phys.Conf.Ser.150:052247,2009

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1088/1742-6596/150/5/052247

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 $N_f \geq 1.5$, implying that a pseudogap phase separates the superconducting phase from the antiferromagnetic phase.

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