Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.57: Poster

Wednesday, March 14, 2012, 16:30–19:00, Poster.I+II

Bloch oscillations in discrete quantum walks — •Maximilian Genske, Andreas Steffen, Noomen Belmechri, Andrea Alberti, Wolfgang Alt, and Dieter Meschede — Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, 53115 Bonn

The question of quantum simulation and processing has become very interesting in recent years. Particularly in the context of ultra cold atoms, experimental proposals have been made and realizations of these achieved. The concept of a quantum random walk is a candidate for realizing quantum algorithms. Our group has accomplished such a walk with neutral atoms in an optical lattice [Karski et al. Science 2009]. Due to the characteristics of the walk operations, this time and space discrete system is expected to show quantum transport phenomena which are typical for arrangements of a periodic potential. One of those are the well known Bloch oscillations. Prospectively, by using additional walk levels one should be able to resemble the effect of a magnetic field on Bloch electrons, which gives rise to the fractal structure described by Hofstadter's butterfly.