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Quantum Information Laboratory
Person in charge of the Unit : Oui
Our main field of research is the theory of quantum information. We also work on experimental quantum optics.Finally we have an activity in machine learning.
Theoretical Physics : Fundamental Interactions
Our research is at the interface between fundamental interactions, including gravity, and cosmology. We use experiments and observations from colliders, telescopes, underground detectors, etc, to uncover the laws of nature beyond those encompassed within the Standard Model of particle physics. The topics we are concerned with include the nature and origin of dark matter and dark energy, the physics of neutrinos, the origin of the baryon asymmetry of the universe and its relation to CP violation and, last but not least, the mechanism at the origin of the mass of elementary particles (the Brout-Englert-Higgs mechanism).
We want to manipulate light at the quantum level, i.e. at the level of single photons. A first aim is to develop the experimental techniques that will enable these kinds of experiments. We thus develop sources of photon pairs in optical fibers and in silicon nanostructures and we manipulate entangled photons in the frequency domain. A second aim is to realize quantum communication protocols that don't have a classical analog, such as quantum cryptography or quantum coin tossing.
We study different aspects of the theory of quantum information, such as quantum communication and quantum cryptography, quantum non locality, quantum algorithms, quantum measurements, quantum randomness, quantum cloning, and the foundations of quantum mechanics. Recently we introduced the notion of device independent information processing, in which the correct operation of a quantum protocol is certified by quantum non locality.