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报告人：张海青（北京航空航天大学）
abstract: Formation and evolution of topological defects from spontaneous symmetry breaking has become a prime and complex topic in cosmology and high-temperature superconductivity. We tackle this issue by breaking U(1) symmetry and examining the spontaneous formation of vortices in a $(2+1)$-dimensional superconductor from gauge/gravity duality, which is a `first-principle' means to solve strongly correlated systems. Magnetic fluxons with quantized fluxes are observed to be generated and trapped in the core of the order parameter vortices. By investigating the dispersion of the typical winding number and vortex-vortex correlation functions, it is found that the spatial distribution of vortices exhibits short-range and nearest-neighboring vortex-antivortex pair correlations, which is in line with the Kibble-Zurek mechanism.