### Critical phenomena in 2D disordered systems (2)

**Ludwig, A ***(Santa Barbara)*

Wednesday 23 July 2008, 09:00-10:30

Seminar Room 1, Newton Institute

#### Abstract

Chalker-Coddington network model for the SQHT. Exact solution of the CCNM for the SQHT, and mapping to percolation. Discussion of some of the exact results: average density of states, average conductance in finite size, universal crossover function and critical conductivity. Physics of 2D `Thermal Quantum Hall transition' (TQHT/class D); topological (p_x+ip_y) superconductor; weak (topological) and strong pairing phases; connections with the 2D Ising model. The Chalker-Coddington network model for the TQHT: a richer variety of possible phenomena