Producción Científica Profesorado

2008

García-Compeán, H.; Herrera-Suárez, W.; Itzá-Ortiz, B. A.; Loaiza-Brito, O. D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory, Journal of High Energy Physics, Issue 12, pp. 007 (2008). Preprinted

**Abstract**

A classification of D-branes in Type IIB Op? orientifolds and orbifolds in terms of Real and equivariant KK-groups is given. We classify D-branes intersecting orientifold planes from which are recovered some special limits as the spectrum for D-branes on top of Type I Op? orientifold and the bivariant classification of Type I D-branes. The gauge group and transformation properties of the low energy effective field theory living in the corresponding unstable D-brane system are computed by extensive use of Clifford algebras. Some speculations about the existence of other versions of KK-groups, based on physical insights, are proposed. In the orbifold case, some known results concerning D-branes intersecting orbifolds are reproduced and generalized. Finally, the gauge theory of unstable systems in these orbifolds is recovered.

Propagation of Elastic Waves along Interfaces in Layered Beams

Slow decay of end effects in layered structures with an imperfect interface

Quasi-periodic breathers in Hamiltonian networks of long-range coupling

Eigenfunction expansions and spectral projections for isotropic elasticity outside an obstacle

THE C*-ALGEBRAS ASSOCIATED TO TIME-t AUTOMORPHISMS OF MAPPING TORI

CONTINUOUS AND DISCRETE FLOWS ON OPERATOR ALGEBRAS

BlochFloquet waves and localisation within a heterogeneous waveguide with long cracks

PROPAGATION OF ELASTIC WAVES ALONG INTERFACES IN LAYERED BEAMS