Entanglement in nano systems

Abstract: This bachelor thesis on entanglement in nano systems includes a short presen-tation of the history of quantum mechanics before entanglement takes the spot light. A definition of entanglement will be stated as well as a prescription to quantify it for a pure system. The knowledge will then be used to quantify the entanglement for the ground state of few particle systems containing 2, 3 and 4 particles. The model that will be used is chosen to be as simple as possible, but it can still give a feeling of how the entropy behaves in these small systems. The few-particle systems can be compared to atoms in a molecule or quantum dots in a nano system.