Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 38: Quantengase: Optische Gitter 3

Q 38.4: Vortrag

Donnerstag, 15. März 2012, 11:30–11:45, V53.01

Formation of optical flux lattices using Raman transitions — •Gediminas Juzeliunas1 and Ian Spielman21Institute of Theoretical Physics and Astronomy, Vilnius University, A. Goštauto 12, LT-01108 Vilnius, Lithuania — 2Joint Quantum Institute, National Institute of Standards and Technology, and University of Maryland, Gaithersburg, Maryland, 20899, USA

It is now possible to create artificial magnetic field for ultra cold atoms using geometric gauge potentials [1]. Recently it was shown that the magnetic flux induced by the geometric potentials can be made proportional to the surface area of the atomic cloud and thus be considerably increased [2,3] as compared to the previous proposals where the flux was proportional to the linear extend of the cloud. For this extension it was suggested to use periodic atom-light coupling and detuning. Here we consider a realistic scheme of creating a square optical flux lattice using Raman transitions induced by a set of properly chosen polarization-dependent optical standing waves with a time-phase difference. Such a method produces both a non-stagard magnetic flux and also a lattice potential. [1] J. Dalibard, F. Gerbier, G.Juzeliunas, and P.Ohberg. Artificial gauge potentials for neutral atoms. Rev. Mod. Phys. 83 1523 (2011). [2] N.R. Cooper. Optical flux lattices for ultracold atomic gases. Phys. Phys. Lett. 106, 175301 (2011). 3. N. R. Cooper and J. Dalibard. Optical flux lattices for two-photon dressed states. Europhys. Lett. 95, 66004 (2011).

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