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Controlled photon emission and Raman transition experiments with a single trapped atom

Jones, M.P.A.; Darquie, B.; Beugnon, J.; Dingjan, J.; Bergamini, S.; Sortais, Y.; Messin, G.; Browaeys, A. and Grangier, P. (2005). Controlled photon emission and Raman transition experiments with a single trapped atom. In: XVII International Conference on Laser Spectroscopy, 19-24 Jun 2005, Aviemore, UK.

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We present recent results on the coherent control of an optical transition in a single rubidium atom, trapped in an optical tweezer. We excite the atom using resonant light pulses that are short (4 ns) compared with the lifetime of the excited state (26 ns). By varying the intensity of the laser pulses, we can observe an adjustable number of Rabi oscillations, followed by free decay once the light is switched off. To generate the pulses we have developed a novel laser system based on frequency doubling a telecoms laser diode at 1560 nm. By setting the laser intensity to make a π pulse, we use this coherent control to make a high quality triggered source of single photons. We obtain an average single photon rate of 9600s-1 at the detector. Measurements of the second-order temporal correlation function show almost perfect antibunching at zero delay. In addition, we present preliminary results on the use of Raman transitions to couple the two hyperfine levels of the ground state of our trapped atom. This will allow us to prepare and control a qubit formed by two hyperfine sub-levels.

Item Type: Conference or Workshop Item
Extra Information: Conference proceedings published as: Hinds, E.A., Allister Ferguson & Erling Riis(eds): Laser Spectroscopy: Proceedings of the XVII International Conference. ISBN of published proceedings: 981-256-659-7. UK, December 2005.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 6800
Depositing User: Silvia Bergamini
Date Deposited: 13 Feb 2007
Last Modified: 04 Oct 2016 09:58
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