Results 11 to 20 of about 525,797 (147)

Towards a covariant canonical formulation for closed topological defects without boundaries [PDF]

open access: yes, 2002
On the basis of the covariant description of the canonical formalism for quantization, we present the basic elements of the symplectic geometry for a restricted class of topological defects propagating on a curved background spacetime.
Ashtekar A   +3 more
core   +2 more sources

Fluctons [PDF]

open access: yes, 2006
From the perspective of topological field theory we explore the physics beyond instantons. We propose the fluctons as nonperturbative topological fluctuations of vacuum, from which the self-dual domain of instantons is attained as a particular case ...
J. M. SOLANO-ALTAMIRANO   +2 more
core   +2 more sources

Adjoint operators, gauge invariant perturbations, and covariant symplectic structure for black holes in string theory

open access: yes, 2002
Expressions for the general and complete perturbations in terms of Debye potentials of static charged black holes in string theory, valid for curvature below the Planck scale, are derived starting from a decoupled set of equations and using Wald's method
Cartas-Fuentevilla R.   +7 more
core   +1 more source

On the symplectic structures for geometrical theories

open access: yes, 2002
We present a new approach for constructing covariant symplectic structures for geometrical theories, based on the concept of adjoint operators.
Cartas-Fuentevilla R.   +2 more
core   +2 more sources

The Kodama state for topological quantum field theory beyond instantons

open access: yes, 2005
Constructing a symplectic structure that preserves the ordinary symmetries and the topological invariance for topological Yang-Mills theory, it is shown that the Kodama (Chern-Simons) state traditionally associated with a topological phase of unbroken ...
Cartas-Fuentevilla   +12 more
core   +2 more sources

Spontaneous symmetry breaking, and strings defects in hypercomplex gauge field theories

open access: yes, 2015
Inspired by the appearance of split-complex structures in the dimensional reduction of string theory, and in the theories emerging as byproducts, we study the hyper-complex formulation of Abelian gauge field theories, by incorporating a new complex unit ...
Cartas-Fuentevilla, R., Meza-Aldama, O.
core   +1 more source

El teatro de entrecasa de Manuel Puig: sus cartas familiares desde una perspectiva queer [PDF]

open access: yes, 2013
El escrito toma como objeto las cartas familiares (publicadas) de Manuel Puig con el fin de pensar el género autobiográfico. Se describe el intercambio postal entre el escritor argentino y su familia [Puig, Manuel. Querida Familia: Tomo 1.
Lozano, Ezequiel
core   +1 more source

The Euler characteristic and the first Chern number in the covariant phase space formulation of string theory

open access: yes, 2004
Using a covariant description of the geometry of deformations for extendons, it is shown that the topological corrections for the string action associated with the Euler characteristic and the first Chern number of the normal bundle of the worldsheet ...
Arreaga G.   +5 more
core   +2 more sources

Covariant canonical formalism for four-dimensional BF theory

open access: yes, 2006
The covariant canonical formalism for four-dimensional BF theory is performed. The aim of the paper is to understand in the context of the covariant canonical formalism both the reducibility that some first class constraints have in Dirac's canonical ...
Ashtekar A.   +4 more
core   +1 more source

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