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New structures of vortices: from cosmology to analogue models


This research project focuses on linear topological defects arising through the spontaneous breaking of a U(1) symmetry, which determines their most salient properties. Examples are cosmic strings and vortex lines in cold atoms, respectively, which in spite of the widely different energy scales (the Electroweak or Grand Unification scales for cosmic strings, versus temperatures close to or smaller than a Kelvin for cold atoms) share important common traits. In this project, we are interested in exploring the recently discovered excited superconducting string solutions of a U(1)x U(1) model in more detail. We would like to investigate the (in)stability of the solutions, in particular we would like to understand the emission of different types of radiation during their (possible) decay. One focus will be to understand the space-time structure and the emission of gravitational waves as well as possible analogue models in cold atoms. (AU)

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