We discuss decoherence in discrete-time quantum walks in terms of a phenomenological model that distinguishes spin and spatial decoherence. We identify the dominating mechanisms that affect quantum-walk experiments realized ...

[no abstract]

Die vorliegende kumulative Dissertation stellt die Ergebnisse der qualitativen Studie zur Bedeutung und Konturierung des Raums und der Lernbegleitung im Kontext von Lernwerkstattarbeit in Kindertageseinrichtungen vor. ...

Moduli spaces of (polarised) Enriques surfaces can be described as open subsets of modular varieties of orthogonal type. It was shown by Gritsenko and Hulek that there are, up to isomorphism, only finitely many different ...