Quantum simulation and entanglement engineering in quantum cascade laser frequency combs (Qombs) 

[H2020: FETFLAG-03-2018: FET Flagship on Quantum Technologies]

The Qombs project aims to create a quantum simulator platform made of ultracold atoms in optical lattices. The quantum platform will allow to design and engineer a new generation of quantum cascade laser frequency combs. This unprecedented quantum simulation of semiconductor structures will endow the devices with brand new features, like non-classical emission modes, entanglement among the modes of the comb and parametric generation of comb patterns far from the central emission frequency. In parallel, the quantum simulation will allow to improve present-day performances of quantum cascade lasers (QCLs) and quantum well structures for photon detection. Full quantum simulation will be followed by real manufacturing and state- of-the-art characterization. In this project, Alpes will study the manufacturability of dispersion-compensated QCL waveguides based on coupled modes, with the objective of identifying and realizing designs and fabrication processes that optimize the process window. An enhanced control of coupled waveguide fabrication for dispersion compensation will be lead to the successful implementation of novel squeezed-state QCL-comb designs.