Non-uniqueness phase in hyperbolic marked random connection models using the spherical transform

Abstract A non-uniqueness phase for infinite clusters is proven for a class of marked random connection models (RCMs) on the d -dimensional hyperbolic space, Hᵈ, in a high volume-scaling regime. The approach taken in this paper utilizes the spherical transform on Hᵈ to diagonalize convolution by the adjacency function and the two-point function and bound their L² L² operator norms. Under some circumstances, this spherical transform approach also provides bounds on the triangle diagram that allows for a derivation of certain mean-field critical exponents. In particular, the results are applied to some Boolean and weight-dependent hyperbolic RCMs. While most of the paper is concerned with the high volume-scaling regime, the existence of the non-uniqueness phase is also proven without this scaling for some RCMs whose resulting graphs are almost surely not locally finite.