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Spinning Hopf solitons on S3 × ℝ
(2006-03-01)
We consider a field theory with target space being the two dimensional sphere S2 and defined on the space-time S3 × . The Lagrangean is the square of the pull-back of the area form on S2. It is invariant under the conformal ...
Static Hopfions in the extended Skyrme-Faddeev model
(INT SCHOOL ADVANCED STUDIES, 2009)
We construct static soliton solutions with non-zero Hopf topological charges to a theory which is an extension of the Skyrme-Faddeev model by the addition of a further quartic term in derivatives. We use an axially symmetric ...
On the integration of fields and quanta in time dependent backgrounds
(Springer, 2014)
Field theories with global continuous symmetries may admit configurations in
which time translation invariance is broken by the movement of homogeneous background
fields evolving along the flat directions implied by the ...
Loop Integrals in Three Outstanding Gauges: Feynman, Light-Cone, and Coulomb
(2001-03-20)
We apply the negative dimensional integration method (NDIM) to three outstanding gauges: Feynman, light-cone, and Coulomb gauges. Our aim is to show that NDIM is a very suitable technique to deal with loop integrals, ...
Integrability and conformal symmetry in higher dimensions: A model with exact hopfion solutions
(2002-11-11)
We use ideas on integrability in higher dimensions to define Lorentz invariant field theories with an infinite number of local conserved currents. The models considered have a two-dimensional target space. Requiring the ...
Integrability and conformal symmetry in higher dimensions: A model with exact hopfion solutions
(2002-11-11)
We use ideas on integrability in higher dimensions to define Lorentz invariant field theories with an infinite number of local conserved currents. The models considered have a two-dimensional target space. Requiring the ...
Three-point functions and su(1 vertical bar 1) spin chains
(Springer, 2014-09-29)
We compute three-point functions of general operators in the su(1 vertical bar 1) sector of planar N = 4 SYM in the weak coupling regime, both at tree-level and one-loop. Each operator is represented by a closed spin chain ...
Type-II defects in integrable classical field theories
(Universidade Estadual Paulista (UNESP), 2014)