Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 50: Quantengase III
Q 50.2: Vortrag
Dienstag, 8. März 2005, 18:15–18:30, HU Kinosaal
Creation of effective magnetic fields in atomic gases using electromagnetically induced transparency — •Gediminas Juzeliūnas1, Patrik Öhberg2, Julius Ruseckas1, and Alexander Klein3 — 1Vilnius University Research Institute of Theoretical Physics and Astronomy, Goštauto 12, 2600 Vilnius, Lithuania — 2Department of Physics, University of Strathclyde, Glasgow G4 0NG, Scotland — 3Fachbereich Physik, TU Kaiserslautern
In this work we investigate the influence of the control and probe beams of light on the mechanical properties of atomic Bose-Einstein condensates and degenerate Fermi gases. The theory is based on the explicit analysis of the quantum dynamics of cold atoms coupled to the laser beams. In particular we consider that the contol and probe fields contain orbital angular momenta and induce an electromagnetically induced transparency. This allows us to introduce an effective magnetic field which acts on the electrically neutral atoms [1]. In the case of fermions we have a typical, often regarded as an academic, textbook scenario with free electrons moving in a constant magnetic field. This opens up a possibility to study phenomena well known from solid state and condensed matter physics, with all the benefits given by the trapped atoms where a range of experimental parameters such as atom-atom interactions, particle numbers, the shape of the trapping potential etc. can easily be manipulated. In addition, using light as the effective magnetic field is going to be favourable since it is rather difficult to control real magnetic fields.
[1] G. Juzeliunas and P. Ohberg, Phys. Rev. Lett. 93, 033602 (2004).