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Journal of Statistical Physics

, Volume 87, Issue 3–4, pp 755–798 | Cite as

Critical phenomena with convergent series expansions in a finite volume

  • Hildegard Meyer-Ortmanns
  • Thomas Reisz
Articles

Abstract

Linked cluster expansions are generalized from an infinite to a finite volume. They are performed to 20th order in the expansion parameter to approach the critical region from the symmetric phase. A new criterion is proposed to distinguish first- from second-order transitions within a finite-size scaling analysis. The criterion applies also to other methods for investigating the phase structure, such as Monte Carlo simulations. Our computational tools are illustrated with the example of scalar (O(N) models with four- and six-point couplings forN=1 andN=4 in three dimensions. It is shown how to localize the tricritical line in these models. We indicate some further applications of our methods to the electroweak transition as well as to models for superconductivity.

Key Words

Finite-size scaling analysis linked cluster expansions scalarO(N) models critical phenomena tricriticality 

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Copyright information

© Plenum Publishing Corporation 1997

Authors and Affiliations

  • Hildegard Meyer-Ortmanns
    • 1
  • Thomas Reisz
    • 1
    • 2
  1. 1.Institut für Theoretische PhysikUniversität HeidelbergHeidelbergGermany
  2. 2.Heisenberg

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