2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228825We study the generic scaling properties of the mutual information between two disjoint intervals, in a class of one-dimensional quantum critical systems described by the c=1 bosonic field theory. A numerical analysis of a spin-chain model reveals that the mutual information is scale-invariant and depends directly on the boson radius. We interpret the results in terms of correlation functions of branch-point twist fields. The present study provides a new way to determine the boson radius, and furthermore demonstrates the power of the mutual information to extract more refined information of conformal field theory than the central charge.4.1 pages, 5 figuresStatistical MechanicsStrongly Correlated ElectronsHigh Energy Physics - TheoryQuantum Physicstext