Piotr Kopszak

Positive operators and entanglement detection

Quantum entanglement is one of the most important phenomenon in quantum physics. It is interesting from the conceptual point of view, as well as very important in many applications. There are several methods of detecting and classifying entanglement. In my presentation I will concentrate on special observables, namely entanglement witnesses. I will present connection between them and linear operators that are positive, but not completely positive. and recent advances in describing new classes of such operators.