Crystals are formed of electrons and nuclei. These particles have spins that are intrinsic magnetic moments. Spins interact with each other and with external magnetic field or light. These interactions are particularly strong for semiconductor nanosystems such as quantum dots. A field of semiconductor spintronics (spin-based electrons) has formed during the last two decades aiming at fundamental and applied studies of spin physics in nanostructures. This book
focuses on the main aspects of electron and nuclear spin dynamics in semiconductor nanostructures. It summarizes main results of theoretical and experimental studies of interactions in spin systems,
effects of ultrafast spin manipulation by light, phenomena of spin losses, and the physics of the omnipresent spin noise.