Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster II

Q 55.67: Poster

Donnerstag, 11. März 2010, 16:00–19:00, Lichthof

Artificial magnetic fields for stationary light — •Johannes Otterbach¹, Julius Ruseckas², Razmik Unanyan¹, Gediminas Juzeliunas², and Michael Fleischhauer¹ — ¹Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — ²Institute of Theoretical Physics and Astronomy, Vilnius University, 01108 Vilnius, Lithuania

The creation and control of effective gauge potentials for electrically neutral particles, such as cold atoms, has attracted lots of interest recently. Here we show how to create a homogeneous magnetic fields for light-matter quasi-particles, so-called dark-state polaritons (DSP). These particles arise in the Raman interaction of a weak probe field with a coherently driven atomic ensemble and form the basis of phenomena such as slow and stopped light. In the limit of a large pulse length they behave as effective Schrödinger particles with an externally controllable mass and velocity. Confinement to lower dimensions is easily done by using standard resonator or wave-guide techniques. By uniformly rotating the medium, an artificial gauge field is created. We show that in this scheme Landau levels with degeneracies well above 100 can be achieved. Thus the system is well suited to study such effects as the action of a Lorentz force on neutral particles or the bosonic analog of the fractional quantum Hall effect.