Prefer a chat interface with context about you and your work?
Quantum Electrodynamics in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi><mml:mo>=</mml:mo><mml:mn>3</mml:mn></mml:math>from the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ε</mml:mi></mml:math>Expansion
We study quantum electrodynamics in $d=3$ coupled to ${N}_{f}$ flavors of fermions. The theory flows to an IR fixed point for ${N}_{f}$ larger than some critical number ${N}_{f}^{c}$. For ${N}_{f}\ensuremath{\le}{N}_{f}^{c}$, chiral-symmetry breaking is believed to take place. In analogy with the Wilson-Fisher description of the critical $O(N)$ models in $d=3$, …