310 research outputs found
Gravity as a Gauge Theory of Translations
The Poincar\'e group can be interpreted as the group of isometries of a
minkowskian space. This point of view suggests to consider the group of
isometries of a given space as the suitable group to construct a gauge theory
of gravity. We extend these ideas to the case of maximally symmetric spaces to
reach a realistic theory including the presence of a cosmological constant.
Introducing the concept of "minimal tetrads" we deduce Einstein gravity in the
vacuum as a gauge theory of translations.Comment: 14 pages. LaTeX 2
Dynamically broken Anti-de Sitter action for gravity
Due to a suitable Higgs mechanism, a standard Anti-de Sitter gauge theory
becomes spontaneously broken. The resulting Lorentz invariant gravitational
action includes the Hilbert-Einstein term of ordinary Einstein-Cartan gravity
with cosmological constant, plus contributions quadratic in curvature and
torsion, and a scalar Higgs sector.Comment: 7 Revtex pages, no figure
Aportación al estudio etnográfico de los telares
En número dedicado a: La provincia de Cácere
Balcones y ventanas de madera en Las Palmas de Gran Canaria
En número dedicado a: Isla de Gran Canari
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