# Quantum complex networks in multimode optics

Valentina Parigi (Laboratoire Kastler-Brossel/Sorbonne Université, Paris)

When |
Jun 24, 2019
from 11:00 to 12:00 |
---|---|

Where | Amphi. Schrödinger |

Attendees |
Valentina Parigi |

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In the last twenty years network theory has provided a deep insight of complex systems, assembling theoretical tools able to the describe dynamical behavior of biological, social and technological structures. Fundamental constituents of matter, such as photons, electrons and atoms, are quantum objects. However, when we want to account for the emergence of the classical world from its microscopic quantum constituents, or to exploit quantum properties in useful tasks we need to adequately describe- in the first case- and to control - in the second case - a large number of quantum objects and their non-trivial interactions. Multimode quantum optical systems are a natural testbed for exploring complex network structures in a quantum scenario. Indeed, optical parametric processes pumped by frequency combs generate multimode quantum states of light where the structure of quantum correlations can be easily shaped. I will review the experimental platforms, I will describe how they can be used to simulate complex quantum environment, I will show the interest of complex quantum graphs in quantum communication protocols, and how complex network theory can be used to classify non-trivial non-Gaussian quantum states.