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Gaussian effective potential and superconductivity

M. Camarda
(
- Catania U. and
- INFM, Catania
)
,
G.G.N. Angilella
(
- Catania U. and
- INFM, Catania
)
,
R. Pucci
(
- Catania U. and
- INFM, Catania
)
,
F. Siringo
(
- Catania U. and
- INFN, Catania
)

Nov, 2002

5 pages

Published in:

Eur.Phys.J.B 33 (2003) 273

e-Print:

cond-mat/0211523 [cond-mat]

DOI:

10.1140/epjb/e2003-00166-7

View in:

ADS Abstract Service

reference search22 citations

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Abstract: (arXiv)

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.

effective potential
superconductivity
gauge: unitarity
spontaneous symmetry breaking
gauge field theory: U(1)
dimension: 3
Landau-Ginzburg model
field theory: scalar
mass: gap
numerical calculations: interpretation of experiments

References(12)

Figures(0)

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Igor F. Herbut
(
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)
,
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(
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)

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•
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)

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(
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)
,
Paul M. Stevenson
(
- Rice U.
)

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•
e-Print:
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•
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(
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)

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