München 2004 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 22: Poster Quanteninformation, -kommunikation und -computer
Q 22.1: Poster
Dienstag, 23. März 2004, 14:00–16:00, Schellingstr. 3
Addressing of individual neutral atoms — •Igor Dotsenko, Dominik Schrader, Yevhen Miroshnychenko, Mkrtych Khudaverdyan, Stefan Kuhr, Wolfgang Alt, Arno Rauschenbeutel, and Dieter Meschede — Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, 53113 Bonn
We have experimentally solved the problem of addressing individual neutral atoms from a string of atoms stored in a standing wave dipole trap. We apply a magnetic field gradient to produce a position-dependent shift of the atomic hyperfine transitions. Using an intensified CCD-camera we spatially resolve atoms and get information about their positions [1]. The population of each atom is coherently transferred by applying microwave radiation at the corresponding resonance frequency of the atom [2].
By applying spectrally narrow pulses the population of a neighbouring atom is not affected if the atomic separation is larger than ∼2 µm. The coherence properties of the atoms are characterized by observing Rabi oscilations which show no contrast decay within measurement time of 200 µs. Using spin-echo technique the decoherence time T2’ was determined to be of the order of 500 µs. The presented results show the realization of a ’quantum register’ built of single neutral atoms for storing quantum information.
[1] Y. Miroshnychenko et al., Optics Express [in print] [2] D. Schrader et al., in preparation