doi:10.1103/PhysRevA.94.053857engSánchez-Burillo, E.Martín-Moreno, L.Zueco, D.García-Ripoll, J.J.One- and two-photon scattering from generalized v -type atomsART-2016-97582The one- and two-photon scattering matrix S is obtained analytically for a one-dimensional waveguide and a pointlike scatterer with N excited levels (generalized V-type atom). We argue that the two-photon scattering matrix contains sufficient information to distinguish between different level structures which are equivalent for single-photon scattering, such as a V atom with N=2 excited levels and two two-level systems. In particular, we show that the scattering with the V-type atom exhibits a destructive interference effect leading to two-photon coupled-resonator-induced transparency, where the nonlinear part of the two-photon scattering matrix vanishes when each incident photon fulfills a single-photon condition for transparency.2016http://zaguan.unizar.es/record/5847610.1103/PhysRevA.94.053857http://zaguan.unizar.es/record/58476oai:zaguan.unizar.es:58476info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53432-C5info:eu-repo/grantAgreement/ES/MINECO/FIS2012-33022info:eu-repo/grantAgreement/EC/FP7/258191/EU/Participative Research labOratory for Multimedia and Multilingual Information Systems Evaluation/PROMISEinfo:eu-repo/grantAgreement/ES/DGA/FENOL-GROUPPhysical review. A, Atomic, molecular, and optical physics 94, 5 (2016), 053857 [9 pp]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess