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Q: Quantenoptik
Q 313: Quanteneffekte I
Q 313.5: Vortrag
Mittwoch, 6. März 2002, 15:15–15:30, HS 01/E02
Deterministic cavity-QED with a single ion — •Matthias Keller1, Gerhard R. Guthöhrlein1, Kazuhiro Hayasaka2, Birgit Lange1, Wolfgang Lange1, and Herbert Walther1 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Communications Research Laboratory, Kobe, Japan
Recently, we have achieved deterministic control of the interaction between a single 40Ca+-ion stored in a radio-frequency trap and the field of an optical cavity [1]. Using laser Doppler cooling and strong confinement of the ion, the extension of the ion’s wave packet was reduced to 60 nm or 15% of the resonance wavelength. The ion’s position in the cavity was determined from the fluorescent light emitted upon excitation of the ion in the local cavity field. By scanning the ion across the cavity, we could record images of the field distribution in all three dimensions with no disturbance and unprecedented resolution.
The localization of the ion on a sub-wavelength scale in the resonator provides optimum conditions for cavity-QED experiments. We will employ the precisely controlled atom-cavity coupling to deterministically generate single-photon pulses with high efficiency [2]. Equally important is the coherent coupling of neighboring ions in a linear chain with applications in quantum information processing.
[1] G. R. Guthöhrlein, M. Keller, K. Hayasaka, W. Lange, and H. Walther, Nature 414, 49 (2001).
[2] C.K. Law, H.J. Kimble, J. Mod. Opt. 44, 2067 (1997).