000048125 001__ 48125 000048125 005__ 20170921150109.0 000048125 0247_ $$2doi$$a10.1103/PhysRevLett.113.263604 000048125 0248_ $$2sideral$$a88518 000048125 037__ $$aART-2014-88518 000048125 041__ $$aeng 000048125 100__ $$0(orcid)0000-0002-3230-5824$$aSánchez-Burillo, Eduardo 000048125 245__ $$aScattering in the ultrastrong regime: Nonlinear optics with one photon 000048125 260__ $$c2014 000048125 5060_ $$aAccess copy available to the general public$$fUnrestricted 000048125 5203_ $$aThe scattering of a flying photon by a two-level system ultrastrongly coupled to a one-dimensional photonic waveguide is studied numerically. The photonic medium is modeled as an array of coupled cavities and the whole system is analyzed beyond the rotating wave approximation using matrix product states. It is found that the scattering is strongly influenced by the single- and multiphoton dressed bound states present in the system. In the ultrastrong coupling regime a new channel for inelastic scattering appears, where an incident photon deposits energy into the qubit, exciting a photon-bound state, and escaping with a lower frequency. This single-photon nonlinear frequency conversion process can reach up to 50% efficiency. Other remarkable features in the scattering induced by counterrotating terms are a blueshift of the reflection resonance and a Fano resonance due to long-lived excited states 000048125 536__ $$9info:eu-repo/grantAgreement/ES/DGA/FENOL-GROUP$$9info:eu-repo/grantAgreement/ES/MINECO/FIS2011-25167$$9info:eu-repo/grantAgreement/ES/MINECO/FIS2012-33022$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2011-28581-C02 000048125 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000048125 590__ $$a7.512$$b2014 000048125 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b6 / 78 = 0.077$$c2014$$dQ1$$eT1 000048125 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000048125 700__ $$0(orcid)0000-0003-4478-1948$$aZueco Lainez, David$$uUniversidad de Zaragoza 000048125 700__ $$aGarcía-Ripoll, Juan José 000048125 700__ $$0(orcid)0000-0001-9273-8165$$aMartín-Moreno, Luis$$uUniversidad de Zaragoza 000048125 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDepartamento de Física de la Materia Condensada$$cFísica de la Materia Condensada 000048125 773__ $$g113 (2014), 263604 [5 pp.]$$pPhys. rev. lett.$$tPHYSICAL REVIEW LETTERS$$x0031-9007 000048125 8564_ $$s1393849$$uhttps://zaguan.unizar.es/record/48125/files/texto_completo.pdf$$yVersión publicada 000048125 8564_ $$s120918$$uhttps://zaguan.unizar.es/record/48125/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000048125 909CO $$ooai:zaguan.unizar.es:48125$$particulos$$pdriver 000048125 951__ $$a2017-09-21-14:56:47 000048125 980__ $$aARTICLE