2002/11/30 by Massimo Camarda, M. Camarda, G. G. N. Angilella +3
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #High-pressure geophysics and materials #Pulsars and Gravitational Waves Research #cond-mat.supr-con #hep-th
paper · pdf · doi:10.1140/epjb/e2003-00166-7
published as Eur.Phys.J. B33 (2003) 273
arxiv created 2003/05/03 · openalex publication_date 2003/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Gaussian Effective Potential in a fixed transverse unitarity gauge is studied for the static three-dimensional U(1) scalar electrodynamics (Ginzburg-Landau phenomenological theory of superconductivity). In the broken-symmetry phase the mass of the electromagnetic field (inverse penetration depth) and the mass of the scalar field (inverse correlation length) are both determined by solution of the coupled variational equations. At variance with previous calculations, the choice of a fixed unitarity gauge prevents from the occurrence of any unphysical degree of freedom. The theory provides a nice interpolation of the experimental data when approaching the critical region, where the standard mean-field method is doomed to failure.