%0 Journal Article %A Eric Collet %A Sylvain Ravy %T Foreword: Ultrafast Phenomena in condensed matter physics %J Comptes Rendus. Physique %D 2021 %P 3-14 %V 22 %N S2 %I Académie des sciences, Paris %R 10.5802/crphys.88 %G en %F CRPHYS_2021__22_S2_3_0