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  • 1
    Electronic Resource
    Electronic Resource
    Gaussian Effective Potential and superconductivity (2003)
    Springer
    The European physical journal 33 (2003), S. 273-277 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.) – 11.15.Ex Spontaneous breaking of gauge symmetries – 74.20.De Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) – 11.15.Tk Other nonperturbative techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00166-7
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Symmetry breaking of the symmetric left-right model without a scalar bidoublet (2004)
    Springer
    The European physical journal 32 (2004), S. 555-559 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. By invoking the existence of a general O(2) symmetry, a minimal left-right symmetric model based on the gauge group $G = SU(2)_{\mathrm {L}}\otimes SU(2)_{\mathrm {R}}\otimes U(1)_{B-L}$ is shown to require the existence of only two physical Higgs bosons. The lighter Higgs is predicted to have a small mass which could be evaluated by standard perturbation theory. The fermionic mass matrices are recovered by insertion of ad hoc fermion-Higgs interactions. The model is shown to be undistinguishable from the standard model at the currently reachable energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01442-7
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Symmetry breaking and restoring under high pressure: the amazing behaviour of the “simple” alkali metals (2003)
    Springer
    The European physical journal 32 (2003), S. 323-327 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 71.20.Dg Alkali and alkaline earth metals – 62.50.+p High-pressure and shock-wave effects in solids and liquids – 64.70.Kb Solid-solid transitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We argue that an ionic lattice surrounded by a Fermi liquid changes phase several times under pressure, oscillating between the symmetric phase and a low-symmetry dimerized structure, as a consequence of Friedel oscillations in the pair potential. Phase oscillations explain the tendency towards dimerization which has been recently reported for the light alkali metals under high pressure. Moreover, a restoring of the symmetric phase is predicted for such elements at an even higher density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00105-8
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    Paper (German National Licenses)
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