München 2004 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 38: Poster Fallen und Kühlung

Q 38.13: Poster

Donnerstag, 25. März 2004, 14:00–16:00, Schellingstr. 3

Tweezing Cold Atoms with Lasers — •Bernd Mohring¹, Marc Bienert¹, Florian Haug¹, Giovanna Morigi¹, Mark G. Raizen², and Wolfgang P. Schleich¹ — ¹Abteilung für Quantenphysik, Universität Ulm, 89069 Ulm — ²Department of Physics, The University of Texas, Austin, Texas 78712-1081, USA

Quantum tweezers open a promising way to deterministically and coherently extract a well-defined number of atoms out of a Bose-Einstein condensate (BEC). We propose a quantum tweezers scheme based on laser pulses, that allows to coherently transfer atoms from a condensate into a quantum state of a tight confining dipole trap. The BEC is constituted by atoms in the hyperfine state |g>, which is magnetically trapped. The atoms are transferred into the dipole trap by coupling the state |g> to another hyperfine state |e>, which is confined by the dipole trap. The coupling is achieved by an adiabatic transfer with laser pulses, of which two realizations are presented: The adiabatic passage and the “Stark chirped rapid adiabatic passage” (SCRAP).