Abstract
We present numerical and analytical evidence for a first-order phase transition of the ferromagnetic spin chain with partition functionZ(β)=ζ(β−1)/ζ(β) at the inverse temperature βcr=2.
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Knauf, A. Phases of the number-theoretic spin chain. J Stat Phys 73, 423–431 (1993). https://doi.org/10.1007/BF01052771
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DOI: https://doi.org/10.1007/BF01052771