Departamento de Física terá colóquio sobre New structures on line-like topological defects
O debate ocorrerá no auditório do Departamento de Física do CCEN, às 16h
O Departamento de Física da UFPE promoverá colóquio no dia 1º de dezembro sobre o tema “New structures on line-like topological defects”. O evento contará com a participação da professora Betti Hartmann, do Instituto de Física de São Carlos(USP). O debate ocorrerá no auditório do Departamento de Física do CCEN, às 16h.
Topological defects (aka topological solitons) appear in field theory models with spontaneous symmetry breaking and a non-trivial vacuum manifold. Cosmic strings are created whenever a U(1) symmetry gets spontaneously broken and are the topological defect that seems most important from the point of view of cosmological applications. There are several reasons for this: on the one hand, it is believed that cosmic strings might be linked to the fundamental strings of String theory and on the other, essentially all models that try to embed the Theory of Inflation into the scheme of Grand Unification predict the production of cosmic strings. Furthermore, the analysis of recent Cosmic Microwave Background (CMB) data suggests that cosmological models containing cosmic strings provide a viable fit to both the temperature as well as polarization anisotropy spectra. I will first discuss the properties of cosmic strings and explain why - with high precision cosmological data - they provide an interesting testing ground for physics at very high energies and hence the primordial universe. I will also report on newly found excited cosmic string solutions that could potentially alter the properties of the evolution of cosmic string networks and hence the predictions made about the observation of these objects.
Departamento de Física UFPE
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