Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.64: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Quantum optical experiments with charged matter-waves — •Annika Bräuer, Georg Schütz, Alexander Rembold, Andreas Pooch, Henrike Prochel, and Alexander Stibor — Physikalisches Institut, Tübingen, Germany

In the history of quantum optics most experiments have been performed with neutral particles or pointlike electrons. The advantage of neutral atoms and molecules is the possibility to manipulate their inner structure, e.g. with lasers or by thermic excitation. The benefit of electrons is their easy manipulation. Both characteristics can be combined by performing interferometry experiments with ions and charged molecules. We present the setup and current status of the first stable ion biprism-interferometer based on [1] and propose novel quantum optical experiments in connection with the ion structure dependency in the magnetic and electrostatic Aharonov-Bohm effects. Helium ions are thereby field emitted from a novel single atom tip. They are separated and combined by an electrostatic biprism. Such interferometers have interesting technical prospects as highly sensitive detectors for rotation and acceleration. We additionally propose an experiment, where a charged particle biprism-interferometer can be used to measure the energy distribution of coherent field emitted electrons from a fine superconducting niobium tip. These sources could potentially create extremely monochromatic and coherent electron beams.

[1] F. Hasselbach and U. Maier, 1999 Quantum Coherence and Decoherence, ISQM, Tokyo, p. 299