Diabolical critical points are stable higher-codimension defects in parameter space of quantum and classical many-body systems, defined by non-trivial winding of nearby equilibrium states.
The DCP has IR symmetry ˆG, and there is a homomorphismφ:G→ ˆGwithG IR ≤ ˆGthe image ofφ
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In search of diabolical critical points
Diabolical critical points are stable higher-codimension defects in parameter space of quantum and classical many-body systems, defined by non-trivial winding of nearby equilibrium states.