Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 3: Poster Quanteninformation, -kommunikation und Quantencomputer

Q 3.18: Poster

Freitag, 4. März 2005, 11:00–12:30, Poster HU

Rearranging individual neutral atoms in two crossed standing wave dipole traps — •Leonid Förster, Wolfgang Alt, Igor Dotsenko, Mkrtych Khudaverdyan, Yevhen Miroshnychenko, Arno Rauschenbeutel, Dominik Schrader, and Dieter Meschede — Institut für Angewandte Physik, Wegelerstr.8, 53115 Bonn

By optical imaging we have determined the positions of individual Cs atoms in a standing wave dipole trap with a sub-wavelength resolution of 130nm. This allows us to resolve the 532nm-periodical structure of the trapping potential [1]. Together with our optical conveyor belt technique [2], we have transported single atoms, which were initially loaded at a random lattice site, to a predetermined position along the dipole trap axis with an accuracy of 300nm. In order to rearrange a string of atoms we have constructed an auxiliary orthogonal standing wave dipole trap. Using it as optical tweezers, we pick out a selected atom and place it back at a desired destination. The resolution and performance of this set up will be analysed. Possible applications are the preparation of a quantum register [3] of equally spaced neutral atoms and their delivery to a high finesse cavity.

[1] I. Dotzenko et al., submitted to Phys. Rev. Lett. [2] S. Kuhr et al., Science 293, 278 (2001) (published online: 10.1126/science.1062725) [3] D. Schrader et al., Phys. Rev. Lett. 93, 150501-4 (2004)