Partition function zeros in two-dimensional lattice models of the polymer +θ-point

1986 ◽  
Vol 19 (9) ◽  
pp. 2377-2379 ◽  
Author(s):  
Vladimir Privman ◽  
Douglas A. Kurtze
Keyword(s):  
Partition Function ◽  
Lattice Models ◽  
Two Dimensional ◽  
Partition Function Zeros ◽  
Dimensional Lattice ◽  
Function Zeros ◽  
Θ Point

scholarly journals PARTITION FUNCTION ZEROS OF AN ISING SPIN GLASS

1996 ◽  
Vol 06 (06) ◽  
pp. 819-843 ◽  
Author(s):  
P. H. DAMGAARD ◽  
J. LACKI
Keyword(s):  
Partition Function ◽  
Spin Glass ◽  
Spin Glasses ◽  
Lattice Models ◽  
Partition Functions ◽  
Distribution Of Zeros ◽  
Partition Function Zeros ◽  
Polynomial Mappings ◽  
Ising Spin ◽  
Function Zeros

We study the pattern of zeros emerging from exact partition function evaluations of Ising spin glasses on conventional finite lattices of varying sizes. A large number of random bond configurations are probed in the framework of quenched averages. This study is motivated by the relationship between hierarchical lattice models whose partition function zeros fall on Julia sets and chaotic renormalization group flows in such models with frustration, and by the possible connection of the latter with spin glass behavior. In any finite volume, the simultaneous distribution of the zeros of all partition functions can be viewed as part of the more general problem of finding the location of all the zeros of a certain class of random polynomials with positive integer coefficients. Some aspects of this problem have been studied in various areas of mathematics, and we show in particular how polynomial mappings which are used in graph theory to classify graphs, may help in characterizing the distribution of zeros. We finally discuss the possible limiting set of these zeros as the volume is sent to infinity.

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