Quantum diffusion in two-dimensional random systems with particle-hole
symmetry [PDF]
K. ZieglerWe study the scattering dynamics of an $n$-component spinor wavefunction in a random environment on a two-dimensional lattice. In the presence of particle-hole symmetry we find diffusion on large scales. The latter is described by a non-interacting Grassmann field, indicating a special kind of asymptotic freedom in $d=2$.View original: http://arxiv.org/abs/1112.1992
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