Multicanonical study of the 3d ising spin glass at zero temperature
Abstract Using multicanonical sampling, zero-temperature properties of the 3d Edwards-Anderson Ising spin glass model are studied. Finite size scaling with a zero-temperature scaling exponent y = 0.74±0.12 describes the data well. Alternatively, a descriptions in terms of Parisi mean field behavior is still possible. The two scenarios give significantly different predictions on lattices of size ≥12 3 .
We apply a polarization Wigner formalism to the propagation of polarization in a Young interferometer within paraxial approximation. With a very simple ray picture, we obtain complete and rigorous information about polarization evolution via the superposition of the spatial-angular Stokes parameters associated with three light rays. We compare the degree of polarization in the interference region with several measures of the degree of coherence for vectorial fields.