we would like to draw your attention to the 21. Young Atom Opticians (YAO) Conference, which is taking place in spring 2015 at the physics department ETH Zurich. The YAO conference is renowned to be a great meeting ground for young researchers in both experimental and theoretical quantum optics, quantum computation and atomics physics and an excellent platform to present their work. It is specifically aimed at graduate students in the starting phase of their work. The goal is to provide insight into the various research areas of modern quantum optics and at the same time enable the exchange of participants in a relaxed and untamed atmosphere.