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On the Chern classes of singular complete intersections
(2020-03-01)
We consider two classical extensions for singular varieties of the usual Chern classes of complex manifolds, namely the total Schwartz–MacPherson and Fulton–Johnson classes, cSM(X) and cFJ(X). Their difference (up to sign) ...
Induced parity-odd effective action for a Dirac field on S 2 × S 1
(American Physical Society, 2017-05)
We evaluate the parity-odd part of the effective action due to massive Dirac fermions on a S 2 × S 1 manifold, minimally coupled to an external Abelian gauge field. We do that for a special class of gauge-field configurations, ...
Chern-Simons diffusion rate across different phase transitions
(2016-05-24)
We investigate how the dimensionless ratio given by the Chern-Simons diffusion rate ΓCS divided by the product of the entropy density s and temperature T behaves across different kinds of phase transitions in the class of ...
Geometry and stability of spinning branes in AdS gravity
(American Physical Society, 2011-11)
The geometry of spinning codimension-two branes in anti-de Sitter (AdS) spacetime is analyzed in three and higher dimensions. The construction of nonextremal solutions is based on identifications in the covering of AdS ...
Effective field theory and integrability in two-dimensional Mott transition
(2010)
Abstract: We study the Mott transition in a two-dimensional lattice spinless fermion model with nearest neighbors density-density interactions. By means of a two-dimensional Jordan-Wigner transformation, the model is mapped ...
Mott transition and integrable lattice models in two dimensions
(2008)
Abstract: We describe the two-dimensional Mott transition in a Hubbard-like model with nearest neighbors interactions based on a recent solution to the Zamolodchikov tetrahedron equation, which extends the notion of ...
Aspectos matematicos e fisicos da teoria de Chern-Simons
([s.n.], 1996)
Fórmulas residuais de tipo Bott e invariante de Futaki para orbifolds complexos
(Universidade Federal de Minas GeraisUFMG, 2015-02-06)
This work is divided int two parts. In the first part of the work, in Theorem 2.1, we give a first version of Botts fórmula for a compact complex orbifold with isolated singularities. In Theorem 2.4, using a good resolution ...
Folheações holomorfas com grupo de holonomia prescrito
(Universidade Federal de Minas GeraisUFMG, 2014-08-22)
Let F be a foliation de ned by a holomorphic vector eld X on a neighborhood of 0 2 C2 and let G be a group of holomorphic germs of di eomorphisms at 0. We address to the question on whether G is conjugated to the projective ...