Experiment

We use laser-cooled atoms and optical tweezers to investigate the dynamics of entanglement and the interplay of quantum mechanics and gravity. Our experiments rely on entangling interactions using ultra-cold Rydberg atoms in optical tweezers. Our current investigations cover aspects of entangled matter wave interferometry, new possibilities for intelligent quantum optimization in the control of multi-level (qudit) quantum systems, spatio-temporal control of qubit arrays, and an exploration of the trade-offs of computational complexity versus robustness with entangled atomic spins.

We look out into the Universe and gaze at an endless sea of galaxies, hundreds of billions of them, each containing hundreds of billions of stars. Yet all these structures that we see are but the tip of the iceberg. Our Universe is a strange place, dominated by unseen substances we call dark matter and dark energy. What are they, and how does this all work?

We are interested in the study of polariton quantum fluids of light, the investigation of frontier physics mainly related to the interactions and coupling of light with matter both from a macroscopic point of view as well as at the single particle level. We study collective coherent phenomena of condensates of Bose-Einstein in semiconductor materials, exploiting quasiparticles generated by the strong coupling between light and excited states of matter.

The Hybrid Quantum Device group, led by Prof. Junho Suh in the Department of Physics at POSTECH, explores the frontiers of quantum science and technology through solid-state devices that exhibit quantum phenomena across multiple physical domains. The group develops hybrid quantum devices that harness the interactions between photons, phonons, magnons, and electrons, using superconducting circuits coupled to mechanical and other bosonic degrees of freedom to implement two-level and harmonic-oscillator quantum states.

SoftQuantus Experimental Quantum Systems and Benchmarking Group conducts empirical research on the execution, reproducibility and validation of quantum and hybrid quantum-classical workloads across heterogeneous computing environments.

We are developing experiments to create large entangled states of neutral atoms using quantum-coherent control, and investigate new possibilities for high-fidelity quantum control and measurement. This builds upon our prior, foundational work with entangling interactions using ultra-cold Rydberg atoms controlled in optical tweezers, as well as novel techniques for matter wave interferometry. Our current investigations cover aspects of matter wave interferometry, quantum synchronization, and an exploration of computational complexity versus robustness with entangled atomic spins.

Our group studies the linear and nonlinear dynamics of light in photonic lattices and in semiconductor microcavities at the laboratory PhLAM of the Univeristy of Lille and the CNRS.

Our current projects are:

Lattice quantum electrodynamics in an open cavity
Synthetic lattices in coupled fibre rings
Out of equilibrium photon condensates and superfluids

The Photonics and Quantum Information (QPI) team at the institute of Physics of Nice, INPHYNI (UMR 7010 CNRS/Uni. Côte d’Azur, Nice, France) is one of the world experts in quantum photonics.