
arXiv: 2405.04451
Abstract In their recent works [Comm Math Phys 399:367–388 (2023)] and [Comm Math Phys 406:32 (2025)], Michelen and Perkins proved that the pressure of a system of particles with repulsive pair interactions is analytic for activities in a complex neighborhood of $$[0,e\Delta _{\phi }(\beta )^{-1})$$ [ 0 , e Δ ϕ ( β ) - 1 ) , where $$\Delta _{\phi }(\beta )\in (0,C_{\phi }(\beta )]$$ Δ ϕ ( β ) ∈ ( 0 , C ϕ ( β ) ] denotes what they call the potential-weighted connective constant. This paper extends their method to locally stable (possibly attractive), tempered, and hard-core pair potentials. We obtain an analogous analyticity result that is most effective in the high-temperature regime, where it surpasses the classical Penrose-Ruelle bound of $$C_{\phi }(\beta )^{-1}e^{-(\beta C+1)}$$ C ϕ ( β ) - 1 e - ( β C + 1 ) by at least a factor of $$e^{2}$$ e 2 . The main ingredients in the proof include a recursive identity for the one-point density tailored to locally stable hard-core potentials and a corresponding notion of modulations of an activity function.
Statistical Mechanics (cond-mat.stat-mech), hard-core models, Probability (math.PR), FOS: Physical sciences, Applications of statistical mechanics to specific types of physical systems, Mathematical Physics (math-ph), Gibbs point processes, absence of phase transitions, Statistical Mechanics, Equilibrium statistical mechanics, FOS: Mathematics, Algorithms in computer science, locally stable interactions, Mathematical Physics, Probability
Statistical Mechanics (cond-mat.stat-mech), hard-core models, Probability (math.PR), FOS: Physical sciences, Applications of statistical mechanics to specific types of physical systems, Mathematical Physics (math-ph), Gibbs point processes, absence of phase transitions, Statistical Mechanics, Equilibrium statistical mechanics, FOS: Mathematics, Algorithms in computer science, locally stable interactions, Mathematical Physics, Probability
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