610 research outputs found
Lattice supersymmetry with domain wall fermions
Supersymmetry, like Poincare symmetry, is softly broken at finite lattice
spacing provided the gaugino mass term is strongly suppressed. Domain wall
fermions provide the mechanism for suppressing this term by approximately
imposing chiral symmetry. We present the first numerical simulations of N=1
supersymmetric SU(2) Yang-Mills on the lattice in four dimensions using domain
wall fermions.Comment: 3 pages, 2 figures, to appear in the Proceedings of the Meeting of
the Division of Particles and Fields of the American Physical Society
(DPF2000), 9-12 August 2000, Columbus, Ohio, US
Thermodynamics of free domain wall and overlap fermions
Studies of non-interacting lattice fermions give an estimate of the size of
discretization errors and finite size effects for more interesting problems
like finite temperature QCD. We present a calculation of the thermodynamic
equation of state for free domain wall and overlap fermions.Comment: 5 pages, 8 figures, Lattice 2000 (Finite Temperature
Angular Momentum on the Lattice: The Case of Non-Zero Linear Momentum
The irreducible representations (IRs) of the double cover of the Euclidean
group with parity in three dimensions are subduced to the corresponding cubic
space group. The reduction of these representations gives the mapping of
continuum angular momentum states to the lattice in the case of non-zero linear
momentum. The continuous states correspond to lattice states with the same
momentum and continuum rotational quantum numbers decompose into those of the
IRs of the little group of the momentum vector on the lattice. The inverse
mapping indicates degeneracies that will appear between levels of different
lattice IRs in the continuum limit, recovering the continuum angular momentum
multiplets. An example of this inverse mapping is given for the case of the
``moving'' isotropic harmonic oscillator.Comment: v3) Little groups for lattice momenta corrected. Includes corrections
from erratum submitted to Phys. Rev. D and a more consistent labeling scheme.
v2) Minor changes to little groups. (9 pages
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