Anderson localization for a supersymmetric sigma model

Details Anderson localization for a supersymmetric sigma model Anderson localization for a supersymmetric sigma model

2009-10-17

arxiv.org/abs/0910.3325v1

Physics

Mathematical Physics

Scientific paper

We study a lattice sigma model which is expected to reflect the Anderson localization and delocalization transition for real symmetric band matrices in 3D. In this statistical mechanics model, the field takes values in a supermanifold based on the hyperbolic plane. The existence of a diffusive phase in 3 dimensions was proved for low temperatures. Here we prove localization at high temperatures for any dimension $d\geq 1$. Our analysis uses Ward identities coming from internal supersymmetry.

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