Photonic platforms for quantum technology applications

Photons are the best particles to use for quantum application giving their robustness to decoherence and for their relatively easy generation of quantum states, however, one of the major drawbacks is that photons do not interact each other in vacuum. Indeed, 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 and Bose-Einstein Condensation [1].
In this seminar, I will show how the properties of quantum fluids of light can be used to implement all-optical platforms for quantum simulations of various systems, from solid-state physics to astrophysical objects.
In the second part of the talk, I will present our recent achievement of the coupling of a single solid-state emitter with a tapered optical nanofiber, providing a proof of principle for a compact and integrated single photon source [2]. This nanofiber-based platform, exploiting the enhanced interactions between photons and a two-level emitter, is a very promising system for the deterministic generation of non-Gaussian states of light.

References
[1] I. Carusotto and C. Ciuti, Quantum Fluids of Light, Rev. Mod. Phys. 85, 299 (2013)
[2] S. Pierini, M. D'Amato, M. Goyal, Q. Glorieux, E. Giacobino, E. Lhuillier, C. Couteau, A. Bramati, Highly photo-stable Perovskite nanocubes: towards integrated single photon sources based on tapered nanofiber, ACS Photonics 7, 2265 (2020)