139 research outputs found
The breaking of quantum double symmetries by defect condensation
In this paper, we study the phenomenon of Hopf or more specifically quantum
double symmetry breaking. We devise a criterion for this type of symmetry
breaking which is more general than the one existing in the literature, and
therefore extends the number of possible breaking patterns that can be
described consistently. We start by recalling why the extended symmetry notion
of quantum double algebras is an optimal tool when analyzing a wide variety of
two dimensional physical systems including quantum fluids, crystals and liquid
crystals. The power of this approach stems from the fact that one may
characterize both ordinary and topological modes as representations of a single
(generally non-Abelian) Hopf symmetry. In principle a full classification of
defect mediated as well as ordinary symmetry breaking patterns and subsequent
confinement phenomena can be given. The formalism applies equally well to
systems exhibiting global, local, internal and/or external (i.e. spatial)
symmetries. The subtle differences in interpretation for the various situations
are pointed out. We show that the Hopf symmetry breaking formalism reproduces
the known results for ordinary (electric) condensates, and we derive formulae
for defect (magnetic) condensates which also involve the phenomenon of symmetry
restoration. These results are applied in two papers which will be published in
parallel.Comment: 65 pages, 7 figures, correction in table 3, updated reference
Self-Interactions in the Spacetime of a Scalar-Tensor Cosmic String
We study the effect of the geometry and topology of a scalar-tensor cosmic
string space-time on the electric and magnetic fields of line sources. It is
shown that the dilatonic coupling of the gravity induces effects along the
string comparable to a current flow allowing for forbidden regions near the
string.Comment: 7 pages, 2 figures. Revised version to appear in the Phys. Lett.
Measurement of Activity Coefficients at Infinite Dilution for Alcohols in [BMIM][CH3SO4] using HS-SPME/GC-FID
Anatomopatologia e imunofluorescência direta e indireta das lesões de pênfigo foliáceo endêmico resistentes à corticoterapia
Detection of cheese whey and caseinomacropeptide in fermented milk beverages using high performance liquid chromatography
Influência do peso vivo, da idade e do sexo sobre caracterÃsticas de carcaças de equinos
Caracterização espacial do ambiente termoacústico e de iluminância em galpão comercial para criação de frangos de corte
Avaliação do crescimento de tecidos e órgãos de novilhos mestiços Holandês-Gir durante o ganho compensatório. 1. Carcaça
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