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48 papers · 1 filter
A Plaquette Basis for the Study of Heisenberg Ladders
J. Piekarewicz, J. R. Shepard
We employ a plaquette basis-generated by coupling the four spins in a lattice to a well-defined total angular momentum-for the study of Heisenberg ladders with antiferro…
Radiation-Driven Warping: The Origin of Warps and Precession in Accretion Disks
Philip R. Maloney, Mitchell C. Begelman, J. E. Pringle
A geometrically thin, optically thick, warped accretion disk with a central source of luminosity is subject to non-axisymmetric forces due to radiation pressure; the resulting torq…
Massively Parallel Computing of Turbulent Transport in Tokamaks
Jeremy Kepner, Scott Parker, Viktor Decyk
With the advent of the gyrokinetic formalism, recent developments in low-noise nonlinear methods, and enormous gains in computing power, large-scale gyrokinetic simulations ha…
Which Chiral Symmetry is Restored in High Temperature QCD?
Claude Bernard, Tom Blum, Carleton DeTar +7
Sigma models for the high temperature phase transition in quantum chromodynamics (QCD) suggest that at high temperature the SU(N_f) x SU(N_f) chiral symmetry becomes exact, but the…
The Dynamical Equilibrium of Galaxy Clusters
Carlberg, Yee, Ellingson +9
If a galaxy cluster is effectively in dynamical equilibrium then all galaxy populations within the cluster must have distributions in velocity and position that individually reflec…
Radiation from a class of string theoretic black holes
S. P. de Alwis, K. Sato
The emission of a scalar with low energy , from a dimensional black hole with n charges is studied in both string and semiclassical calculations. In the lowes…