Quantum System Control

Significant quantum effects in chemistry range from static structure (electronic and geometrical) through dynamical behavior, including optical properties, conductance, relaxation, decoherence, and thermalization. 

In quantum control it is difficult, if not impossible , to acquire information about quantum states without destroying them. Second, some classes of quantum control tasks, such as controlling quantum entanglement and protecting quantum coherence, are unique for quantum systems. There are no corresponding tasks in classical control theory.