Field theory models for a holographic superconductor in two dimensions

[摘要] We investigate field theory models of holographic superconductors in which the condensation of the order parameter is induced by a Robin boundary condition. Assuming large-c factorization, we study the phase diagram of a two-dimensional CFT deformed by a relevant double-trace perturbation. Using modular invariance, we relate the high- and low-temperature phases, reproducing analytically the results for the zero-winding sector of the holographic model. Moreover, we match the near-critical behaviour of the condensate with an effective Ginzburg-Landau field theory description. Another important feature of the holographic superconductor is the presence of vortices that carry non-integer magnetic flux. We investigate a field theory toy model with similar properties and interpret it as a non-integer penetration flux for the Little-Parks effect.

[发布日期] 2026-09-03

[关键词] AdS-CFT Correspondence;Field Theories in Lower Dimensions;Holography and Condensed Matter Physics (AdS/CMT)