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  • 1990-1994  (1)
  • 1975-1979  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Static properties of the one-dimensional planar ferromagnet in an external field (1979)
    Springer
    The European physical journal 33 (1979), S. 163-171 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermodynamic functions and the correlation length of the classical one-dimensionalX Y model in an external field are calculated by the numerical integration of the transfer matrix equation in both ferro- and antiferromagnetic cases. We show that for a finite but weak magnetic field the low temperature structure of the ferromagnetic partition function consists of a spin-wave part and a factor corresponding to the interaction of topological excitations. The contributions of the soliton like topological objects to the static properties are calculated through a systematic perturbative method. Finally we discuss in detail the regions of validity of different analytical approaches by comparing them with our exact numerical solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323689
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Weak coupling phase structure of the Abelian Higgs model at finite temperature (1993)
    Springer
    The European physical journal 60 (1993), S. 361-368 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the 1-loop reduced 3D action of the Abelian Higgs-model we discuss the order of its finite temperature phase transition. A two-variable saddle point approximation is proposed for the evaluation of the effective potential. The strength of the first order case scales like ∼e 3−6. Analytic asymptotic weak coupling and numerical small coupling solutions are compared with special emphasis on the cancellation of divergences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01474635
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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