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Julia Sets and Complex Singularities of Free Energies
 
Jianyong Qiao School of Science, Beijing University of Posts and Telecommunications, Beijing, People’s Republic of China
Front Cover for Julia Sets and Complex Singularities of Free Energies
Available Formats:
Electronic ISBN: 978-1-4704-2029-1
Product Code: MEMO/234/1102.E
List Price: $76.00
MAA Member Price: $68.40
AMS Member Price: $45.60
Front Cover for Julia Sets and Complex Singularities of Free Energies
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  • Front Cover for Julia Sets and Complex Singularities of Free Energies
  • Back Cover for Julia Sets and Complex Singularities of Free Energies
Julia Sets and Complex Singularities of Free Energies
Jianyong Qiao School of Science, Beijing University of Posts and Telecommunications, Beijing, People’s Republic of China
Available Formats:
Electronic ISBN:  978-1-4704-2029-1
Product Code:  MEMO/234/1102.E
List Price: $76.00
MAA Member Price: $68.40
AMS Member Price: $45.60
  • Book Details
     
     
    Memoirs of the American Mathematical Society
    Volume: 2342014; 89 pp
    MSC: Primary 37; Secondary 82;

    The author studies a family of renormalization transformations of generalized diamond hierarchical Potts models through complex dynamical systems. He proves that the Julia set (unstable set) of a renormalization transformation, when it is treated as a complex dynamical system, is the set of complex singularities of the free energy in statistical mechanics. He gives a sufficient and necessary condition for the Julia sets to be disconnected. Furthermore, he proves that all Fatou components (components of the stable sets) of this family of renormalization transformations are Jordan domains with at most one exception which is completely invariant.

    In view of the problem in physics about the distribution of these complex singularities, the author proves here a new type of distribution: the set of these complex singularities in the real temperature domain could contain an interval. Finally, the author studies the boundary behavior of the first derivative and second derivative of the free energy on the Fatou component containing the infinity. He also gives an explicit value of the second order critical exponent of the free energy for almost every boundary point.

  • Table of Contents
     
     
    • Chapters
    • Introduction
    • 1. Complex dynamics and Potts models
    • 2. Dynamical complexity of renormalization transformations
    • 3. Connectivity of Julia sets
    • 4. Jordan domains and Fatou components
    • 5. Critical exponent of free energy
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Volume: 2342014; 89 pp
MSC: Primary 37; Secondary 82;

The author studies a family of renormalization transformations of generalized diamond hierarchical Potts models through complex dynamical systems. He proves that the Julia set (unstable set) of a renormalization transformation, when it is treated as a complex dynamical system, is the set of complex singularities of the free energy in statistical mechanics. He gives a sufficient and necessary condition for the Julia sets to be disconnected. Furthermore, he proves that all Fatou components (components of the stable sets) of this family of renormalization transformations are Jordan domains with at most one exception which is completely invariant.

In view of the problem in physics about the distribution of these complex singularities, the author proves here a new type of distribution: the set of these complex singularities in the real temperature domain could contain an interval. Finally, the author studies the boundary behavior of the first derivative and second derivative of the free energy on the Fatou component containing the infinity. He also gives an explicit value of the second order critical exponent of the free energy for almost every boundary point.

  • Chapters
  • Introduction
  • 1. Complex dynamics and Potts models
  • 2. Dynamical complexity of renormalization transformations
  • 3. Connectivity of Julia sets
  • 4. Jordan domains and Fatou components
  • 5. Critical exponent of free energy
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