48125 20170921150109.0 doi 10.1103/PhysRevLett.113.263604 sideral 88518 ART-2014-88518 eng (orcid)0000-0002-3230-5824 Sánchez-Burillo, Eduardo Scattering in the ultrastrong regime: Nonlinear optics with one photon 2014 Access copy available to the general public Unrestricted The scattering of a flying photon by a two-level system ultrastrongly coupled to a one-dimensional photonic waveguide is studied numerically. The photonic medium is modeled as an array of coupled cavities and the whole system is analyzed beyond the rotating wave approximation using matrix product states. It is found that the scattering is strongly influenced by the single- and multiphoton dressed bound states present in the system. In the ultrastrong coupling regime a new channel for inelastic scattering appears, where an incident photon deposits energy into the qubit, exciting a photon-bound state, and escaping with a lower frequency. This single-photon nonlinear frequency conversion process can reach up to 50% efficiency. Other remarkable features in the scattering induced by counterrotating terms are a blueshift of the reflection resonance and a Fano resonance due to long-lived excited states info:eu-repo/grantAgreement/ES/DGA/FENOL-GROUP info:eu-repo/grantAgreement/ES/MINECO/FIS2011-25167 info:eu-repo/grantAgreement/ES/MINECO/FIS2012-33022 info:eu-repo/grantAgreement/ES/MINECO/MAT2011-28581-C02 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 7.512 2014 PHYSICS, MULTIDISCIPLINARY 6 / 78 = 0.077 2014 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0003-4478-1948 Zueco Lainez, David Universidad de Zaragoza García-Ripoll, Juan José (orcid)0000-0001-9273-8165 Martín-Moreno, Luis Universidad de Zaragoza 2003 395 Universidad de Zaragoza Departamento de Física de la Materia Condensada Física de la Materia Condensada 113 (2014), 263604 [5 pp.] Phys. rev. lett. PHYSICAL REVIEW LETTERS 0031-9007 1393849 http://zaguan.unizar.es/record/48125/files/texto_completo.pdf Versión publicada 120918 http://zaguan.unizar.es/record/48125/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:48125 articulos driver 2017-09-21-14:56:47 ARTICLE