Polaritons are quasi-particles that originate from the coupling of light with matter and that demonstrate quan- tum phenomena at the many-particle mesoscopic level, such as Bose-Einstein condensation and superfluidity. A highly sought and long-time missing feature of polaritons is a genuine quantum manifestation of their dynamics at the single- particle level. Although they are conceptually perceived as entangled states and theoretical proposals abound for an explicit manifestation of their single-particle properties, so far their behavior has remained fully accounted for by clas- sical and mean-field theories. We report the first experimental demonstration of a genuinely quantum state of the microcavity polariton field, by swapping a photon for a polariton in a two-photon entangled state generated by para- metric downconversion. When bringing this single-polariton quantum state in contact with a polariton condensate, we observe a disentangling with the external photon. This manifestation of a polariton quantum state involving a single quantum unlocks new possibilities for quantum information processing with interacting bosons.

First observation of the quantized exciton-polariton field and effect of interactions on a single polariton / Cuevas, Álvaro; López Carreño, Juan Camilo; Silva, Blanca; De Giorgi, Milena; Suárez-Forero, Daniel G.; Sánchez Muñoz, Carlos; Fieramosca, Antonio; Cardano, Filippo; Marrucci, Lorenzo; Tasco, Vittorianna; Biasiol, Giorgio; del Valle, Elena; Dominici, Lorenzo; Ballarini, Dario; Gigli, Giuseppe; Mataloni, Paolo; Laussy, Fabrice P.; Sciarrino, Fabio; Sanvitto, Daniele. - In: SCIENCE ADVANCES. - ISSN 2375-2548. - 4:4(2018), p. eaao6814. [10.1126/sciadv.aao6814]

First observation of the quantized exciton-polariton field and effect of interactions on a single polariton

Cardano, Filippo;Marrucci, Lorenzo;
2018

Abstract

Polaritons are quasi-particles that originate from the coupling of light with matter and that demonstrate quan- tum phenomena at the many-particle mesoscopic level, such as Bose-Einstein condensation and superfluidity. A highly sought and long-time missing feature of polaritons is a genuine quantum manifestation of their dynamics at the single- particle level. Although they are conceptually perceived as entangled states and theoretical proposals abound for an explicit manifestation of their single-particle properties, so far their behavior has remained fully accounted for by clas- sical and mean-field theories. We report the first experimental demonstration of a genuinely quantum state of the microcavity polariton field, by swapping a photon for a polariton in a two-photon entangled state generated by para- metric downconversion. When bringing this single-polariton quantum state in contact with a polariton condensate, we observe a disentangling with the external photon. This manifestation of a polariton quantum state involving a single quantum unlocks new possibilities for quantum information processing with interacting bosons.
2018
First observation of the quantized exciton-polariton field and effect of interactions on a single polariton / Cuevas, Álvaro; López Carreño, Juan Camilo; Silva, Blanca; De Giorgi, Milena; Suárez-Forero, Daniel G.; Sánchez Muñoz, Carlos; Fieramosca, Antonio; Cardano, Filippo; Marrucci, Lorenzo; Tasco, Vittorianna; Biasiol, Giorgio; del Valle, Elena; Dominici, Lorenzo; Ballarini, Dario; Gigli, Giuseppe; Mataloni, Paolo; Laussy, Fabrice P.; Sciarrino, Fabio; Sanvitto, Daniele. - In: SCIENCE ADVANCES. - ISSN 2375-2548. - 4:4(2018), p. eaao6814. [10.1126/sciadv.aao6814]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/717779
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