000096816 001__ 96816 000096816 005__ 20201124104756.0 000096816 0247_ $$2doi$$a10.1103/PhysRevLett.123.013601 000096816 0248_ $$2sideral$$a113198 000096816 037__ $$aART-2019-113198 000096816 041__ $$aeng 000096816 100__ $$aSanchez-Burillo, E. 000096816 245__ $$aSingle Photons by Quenching the Vacuum 000096816 260__ $$c2019 000096816 5060_ $$aAccess copy available to the general public$$fUnrestricted 000096816 5203_ $$aHeisenberg's uncertainty principle implies that the quantum vacuum is not empty but fluctuates. These fluctuations can be converted into radiation through nonadiabatic changes in the Hamiltonian. Here, we discuss how to control this vacuum radiation, engineering a single-photon emitter out of a two-level system (2LS) ultrastrongly coupled to a finite-band waveguide in a vacuum state. More precisely, we show the 2LS nonlinearity shapes the vacuum radiation into a non-Gaussian superposition of even and odd cat states. When the 2LS bare frequency lays within the band gaps, this emission can be well approximated by individual photons. This picture is confirmed by a characterization of the ground and bound states, and a study of the dynamics with matrix-product states and polaron Hamiltonian methods. 000096816 536__ $$9info:eu-repo/grantAgreement/ES/DGA/CAM PRICYT/QUITEMAD+S2013-CE-2801$$9info:eu-repo/grantAgreement/ES/DGA/Q-MAD$$9info:eu-repo/grantAgreement/EC/H2020/742102/EU/Quantum Emitters in non-conventional baths/QUENOCOBA$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 742102-QUENOCOBA$$9info:eu-repo/grantAgreement/ES/MCIU/MAT2017-88358-C3-1-R$$9info:eu-repo/grantAgreement/ES/MINECO/FIS2015-70856-P$$9info:eu-repo/grantAgreement/EUR/QUANTERA/SUMO 000096816 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000096816 590__ $$a8.385$$b2019 000096816 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b6 / 85 = 0.071$$c2019$$dQ1$$eT1 000096816 592__ $$a3.588$$b2019 000096816 593__ $$aPhysics and Astronomy (miscellaneous)$$c2019$$dQ1 000096816 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000096816 700__ $$aMartin-Moreno, L. 000096816 700__ $$aGarcia-Ripoll, J.J. 000096816 700__ $$0(orcid)0000-0003-4478-1948$$aZueco, D.$$uUniversidad de Zaragoza 000096816 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada 000096816 773__ $$g123, 1 (2019), 013601 [6 pp]$$pPhys. rev. lett.$$tPhysical Review Letters$$x0031-9007 000096816 8564_ $$s189020$$uhttps://zaguan.unizar.es/record/96816/files/texto_completo.pdf$$yVersión publicada 000096816 8564_ $$s19349$$uhttps://zaguan.unizar.es/record/96816/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000096816 909CO $$ooai:zaguan.unizar.es:96816$$particulos$$pdriver 000096816 951__ $$a2020-11-22-12:39:23 000096816 980__ $$aARTICLE