Giorgio Ciliberto

Tue, 23 Dec 2025 00:00:00 +0000

After a PhD thesis at Saclay and Freiburg Universities about Non-locality and Back-reaction in Acoustic Black Holes and Non-linearity in Quantum Fluid Dynamics (2022-2024), I joined (2025) as a Post-Doc the QI group at LIP6 to work as a theoretician mainly on continuous variable (CV) quantum photonic architectures such as CV graph states.

Quantum backreaction in an analog black hole

Tue, 23 Dec 2025 00:00:00 +0000

Backreaction equations for 1 + 1 dimensional BEC sonic black holes

Mon, 15 Dec 2025 00:00:00 +0000

We present a combined experimental and theoretical investigation of the formation and decay kinetics of vortices in two-dimensional, compressible quantum turbulence. We follow the temporal evolution of a quantum fluid of exciton polaritons, hybrid light-matter quasiparticles, and measure both phase and modulus of the order parameter in the turbulent regime. Fundamental topological conservation laws require that the formation and annihilation of vortices also involve critical points of the velocity field, namely nodes and saddles. Identifying the simplest mechanisms underlying these processes enables us to develop an effective kinetic model that closely aligns with the experimental observations, and shows that different processes are responsible for vortex number growth and decay. These findings underscore the crucial role played by topological constraints in shaping nonlinear, turbulent evolution of two-dimensional quantum fluids.

Giorgio Ciliberto | LIP6 - Équipe QI

Giorgio Ciliberto

Quantum backreaction in an analog black hole

Backreaction equations for 1 + 1 dimensional BEC sonic black holes