Leticia Tarruell, the group leader of Cold Gas Experiments at ICFO, is one of the world leading researchers in the area of experimental atomic physics of ultracold atoms. Leticia became a faculty member at ICFO after spectacular path, including École Normale Supèrieure in Paris and ETH in Zürich. Her scientific achievements are truly stunning. At ENS she contributed to experiments in Christophe Salomon group on BCS-BEC crossover, at ETH she led the experiments on artificial graphene and Dirac points, as well as those on flexible optical lattices, which shape can be changed in the real time. At ICFO, Leticia was the first to observe novel state of matter, the so called quantum droplets in a mixture of Bose gases with attractive interactions that are stabilized by the zero point energy fluctuations. This discovery led to novel studies of the crossover between bright solitons and quantum droplets and much more. Very recently, Leticia demonstrated in her laboratory novel type of topological gauge theories with chiral interactions. Leticia is the great teacher and animator of science: many of her disciples work in the best laboratories all around the world.