Mathieu Gisselbrecht is an Associate Professor at Department of Physics of Lund University, on secondment from CNRS. His research interests are related to the study of ultrafast dynamics in atoms, molecules and clusters using synchrotron radiation and attosecond light sources. He has more than 15 years of experience in developing and applying 3D imaging spectrometers to study fundamental problem of quantum physics, such as the double ionization, the frontier of the Born-Oppenheimer approximation, and more recently coherence of electron wave-packets. In addition, he bridges the gap between molecular science and cluster sciences by exploring the mechanisms of energy transfer in matter.