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Title: Vacuum polarization in gravitational and electromagnetic fields around a superconducting string

We have calculated the polarization current induced in the physical vacuum around a superconducting cosmic string taking into account the gravitational field of the string. The current can be calculated as an expansion in powers of the inverse of the electron mass. In the region far from the string, where it is justified to keep only the lowest term of this expansion, the polarization current turns out to screen the original current in the string, but the effect is very weak. A direct calculation of terms due to the presence of the gravitational field shows that they are dominated, for realistic string parameters, by the purely electromagnetic contribution.
Authors:
 [1] ;  [2]
  1. (Nicolaus Copernicus Astronomical Centre, Polish Academy of Sciences, 00-716 Warsaw, ul. Bartycka 18, Poland (PL))
  2. (Institute for Theoretical Physics, University of Warsaw, 00-681 Warsaw, ul. Hoza 69, Poland)
Publication Date:
OSTI Identifier:
5594692
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review (Section) D: Particles and Fields; (USA); Journal Volume: 40:6
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL MODELS; TOPOLOGY; ELECTROMAGNETIC FIELDS; VACUUM POLARIZATION; GRAVITATIONAL FIELDS; ENERGY-MOMENTUM TENSOR; MASS RENORMALIZATION; QUANTUM ELECTRODYNAMICS; STRING MODELS; SUPERCONDUCTIVITY; SYMMETRY BREAKING; UNIVERSE; COMPOSITE MODELS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTRODYNAMICS; EXTENDED PARTICLE MODEL; FIELD THEORIES; MATHEMATICAL MODELS; MATHEMATICS; PARTICLE MODELS; PHYSICAL PROPERTIES; QUANTUM FIELD THEORY; QUARK MODEL; RENORMALIZATION; TENSORS 640106* -- Astrophysics & Cosmology-- Cosmology; 645400 -- High Energy Physics-- Field Theory