Quantum fluids of Light
| When |
May 18, 2026
from 10:45 to 11:45 |
|---|---|
| Where | Amphi Anne L'Huillier |
| Contact Name | Etera Livine |
| Attendees |
Alberto Bramati |
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Photons confined in optical cavities or propagating in paraxial geometries acquire an effective mass and behave like matter particles. Moreover, an effective photon-photon interaction can be engineered when the photons propagate in a nonlinear medium, resulting in collective fluid-like behaviors of light, such as superfluidity [1,2].
The characterization of the elementary excitations in such quantum fluids of light is essential to study their collective effects. In this talk, I will present a novel coherent probe spectroscopy technique allowing to measure the Bogoliubov dispersion of the collective excitations of a polariton quantum fluid [3] and I will show how the properties of such fluids of light can be used to study driven-dissipative phase transitions [4] and to simulate astrophysical objects like Black Holes [5, 6].
[1] I. Carusotto and C. Ciuti, Quantum Fluids of Light, Rev. Mod. Phys. 85, 299 (2013)
[2] A. Amo et al;, Superfluidity of polaritons in semiconductor microcavity, Nat. Phys., 5, 805-810 (2009)
[3] F. Claude et al., High-Resolution Coherent Probe Spectroscopy of a Polariton Quantum Fluid, Phys. Rev. Lett., 129, 103601 (2022)
[4] F. Claude et al., Observation of the diffusive Nambu-Goldstone mode of a non-equilibrium phase transition, Nat. Phys. 21, 924–930 (2025).
[5] K. Falque et al. Polariton Fluids as quantum field theory simulators on tailored curved spacetimes, Phys. Rev. Lett. 135, 023401 (2025)
[6] K. Guerrero et al., Multiply Quantized Vortex Spectroscopy in a quantum fluid of light, Phys. Rev. Lett. 135, 243801
(2025)