1,272 research outputs found
Color Superconductivity at Moderate Density
The effect of color breaking on colored quarks' chiral condensates has been
investigated at zero temperature and moderate baryon density. It is found that
the influence of the diquark condensate on different colored quarks is very
small.Comment: 4 pages, 1 figure in eps, talk given at XXXI International Symposium
on Multiparticle Dynamics, Sept 1-7, 2001, Datong China. See
http://ismd31.ccnu.edu.cn
Synthetic Topological Degeneracy by Anyon Condensation
Topological degeneracy is the degeneracy of the ground states in a many-body
system in the large-system-size limit. Topological degeneracy cannot be lifted
by any local perturbation of the Hamiltonian. The topological degeneracies on
closed manifolds have been used to discover/define topological order in
many-body systems, which contain excitations with fractional statistics. In
this paper, we study a new type of topological degeneracy induced by condensing
anyons along a line in 2D topological ordered states. Such topological
degeneracy can be viewed as carried by each end of the line-defect, which is a
generalization of Majorana zero-modes. The topological degeneracy can be used
as a quantum memory. The ends of line-defects carry projective non-Abelian
statistics, and braiding them allow us to perform fault tolerant quantum
computations.Comment: 4 pages + references + 3 pages of supplementary material, 2 figures.
reference update
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