Ares Santos, LauraLuis Aina, Alfredo2023-06-222023-06-222022-07-112469-992610.1103/PhysRevA.106.012415https://hdl.handle.net/20.500.14352/71943©2022 American Physical Society. L.A. and A.L. acknowledge financial support from Spanish Ministerio de Economia y Competitividad Project No. FIS2016-75199-P. L.A. acknowledges financial support from the European Social Fund and the Spanish Ministerio de Ciencia Innovacion y Universidades, Contract Grant No. BES-2017-081942.We provide a coherence-based approach to nonclassical behavior by means of distance measures. We develop a quantitative relation between coherence and nonclassicality quantifiers, which establish the nonclassicality as the maximum quantum-coherence achievable. We compute the coherence of several representative examples and discuss whether the theory may be extended to reference observables with continuous spectra.engjournal articlehttp://dx.doi.org/10.1103/PhysRevA.106.012415https://journals.aps.orgopen access535Radiometric definitionsStatesEntanglementÓptica (Física)2209.19 Óptica Física