163324 20251024172259.0 doi 10.1088/1751-8121/ae0847 sideral 145759 ART-2025-145759 eng Angelone, Giuliano Isospectrality and non-locality of generalized Dirac combs 2025 We consider a generalization of Dirac’s comb model, describing a non-relativistic particle moving in a periodic array of generalized point interactions. The latter represent the most general point interactions rendering the kinetic-energy operator self-adjoint, and form a four-parameters family that includes the δ-potential and the δ-potential as particular cases. We study the parameter dependence of the spectral properties of this system, finding a rich isospectrality structure. We systematically classify a large class of isospectral relations, determining which Hamiltonians are spectrally unique, and which are instead related by a unitary or anti-unitary transformation. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Asorey, Manuel Universidad de Zaragoza (orcid)0000-0003-3669-6241 Ezquerro, Fernando Universidad de Zaragoza Facchi, Paolo 2004 405 Universidad de Zaragoza Dpto. Física Teórica Área Física Teórica 58, 39 (2025), 395301 [33 pp.] Journal of Physics A-Mathematical and Theoretical Journal of Physics A-Mathematical and Theoretical 1751-8113 811351 http://zaguan.unizar.es/record/163324/files/texto_completo.pdf Versión publicada 560137 http://zaguan.unizar.es/record/163324/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:163324 articulos driver 2025-10-24-16:57:08 ARTICLE