Spectrum of collective excitations of a quantum fluid of polaritons

Anno: 2023

Autori: Claude F., Jacquet MJ., Carusotto I., Glorieux Q., Giacobino E., Bramati A.

Affiliazione autori: Sorbonne Univ, ENS Univ PSL, Coll France, Lab Kastler Brossel, 4 Pl Jussieu, F-75252 Paris 05, France; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Trento, Italy.

Abstract: We use a recently developed high-resolution coherent probe spectroscopy method to investigate the dispersion of collective excitations of a polaritonic quantum fluid. We measure the dispersion relation with high energy and wave-number resolution, which allows to determine the speed of sound in the fluid and to evidence the contribution of an excitonic reservoir. We report on the generation of collective excitations at negative energies, on the ghost branch of the dispersion curve. Precursors of dynamical instabilities are also identified. Our methods open the way to the precise study of quantum hydrodynamics of quantum fluids of light.

Giornale/Rivista: PHYSICAL REVIEW B

Volume: 107 (17)      Da Pagina: 174507-1  A: 174507-11

Maggiori informazioni: We acknowledge financial support from the H2020- FETFLAG-2018-2020 project PhoQuS (No. 820392) . MJJ and AB acknowledge support from the Ile de France DIM SIRTEQ project FOLIAGE (No. 237992) . IC acknowledges financial support from the Provincia Autonoma di Trento and from the Q@TN initiative. QG and AB are members of the Institut Universitaire de France.
Parole chiavi: Bose-einstein Condensation; Superfluidity; Helium
DOI: 10.1103/PhysRevB.107.174507

Citazioni: 8
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-15
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui