COLÓQUIO (04/09/2015): Bosonic current in higher dimensional compactified cosmic string spacetime at finite temperature (Dra. Azadeh Mohammadi – Universidade Federal da Paraíba)
The talk is about the finite temperature expectation values of the charge and current densities for a massive bosonic field with nonzero chemical potential in the geometry of a higher dimensional compactified cosmic string with magnetic fluxes, one along the string core and the other enclosed by the compact dimension. These densities are calculated by decomposing them into the vacuum expectation values and finite temperature contributions coming from the particles and antiparticles. The only nonzero components correspond to the charge, azimuthal and axial current densities. Thanks to the Abel-Plana formula, one can decompose the densities to the part induced by the string and the one by the compactification. In this talk my main concern is the thermal effect on the charge and current densities, including some limiting cases, the low and high temperature approximations. In all cases the temperature enhances the induced densities.