Workshop in Honour of Reinhold A. Bertlmann Mitschnitt einer Veranstaltung der Fakultät für Physik der Universität Wien am Sonntag, dem 27. Juni 2010 im Seminar-Hotel Schneeberghof in Puchberg am Schneeberg Teil 7A: Katharina Durstberger: Quantum Physics With Neutrons - Theory & Experiment (erster Teil) Moderation: Beatrix Hiesmayr Fundamental properties like coherence and entanglement are among the most interesting features of quantum mechanics. The physical system of interest is the neutron which is a proper object for the study of quantum mechanical behavior. An interferometer allows for quantum experiments on macroscopic scale and a polarimeter manages the neutron’s spin, one of the simplest two-level quantum system with high-efficient manipulation by magnetic fields. In combination with interferometric measurements the system has enough intrinsic richness to show remarkable quantum features. The coupling of the neutron to an external magnetic field allows for selective manipulations of the spinor quantum states and their energies. This can be used to create entangled states where the entanglement occurs between different degrees of freedom and, in addition, one can induce dephasing and decoherence by varying magnetic fields. This talk gives an overview over recent achievements in neutron interferometry. Kapitel Titel Position --------------------------------------------------------------------- 1. Vorspann 00:00:00 2. Introduction and overview 00:00:19 3. Basics of neutrons and neutron interferometry 00:03:58 4. Entanglement 00:12:59 5. The Bell equation for neutrons 00:20:42 6. Open quantum systems 00:36:40 7. Decoherence for neutrons 00:46:10 8. Geometric phase 01:00:07 9. Summary 01:10:54

Neutron, Neutroneninterferometrie, Verschränkter Zustand, Geometrische Phase

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