In this paper recent experiments with trapped ions are reviewed. They deal with the spectrum of the resonance fluorescence of a single ion, the ion-trap laser, experiments towards a new frequency standard on the basis of a single In+ ion, and the investigation of the diffusion of a single ion in a one-dimensional optical lattice.
In this paper recent experiments with single trapped ions are reviewed. They deal with the spectrum of the resonance fluorescence of a single ion, the ion trap laser and with experiments towards a new frequency standard on the basis of a single In + ion. The experiments demonstrate essential ingredients necessary to realize quantum logic gates using trapped ions. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
In this paper recent experiments with the one-atom maser or micromaser performed by our group will be reviewed, as well as experiments with single ions in traps. The discussion is limited to results relevant in connection with the experimental realization of a quantum computer. The principle of the electrode configuration of the ion trap used for the investigation of the spectrum of resonance fluorescence described in the second part of this paper has also been used to realize a linear trap. This work on resonance fluorescence and the more recent work on ordered structures in a miniature trap being produced recently are the basis for the use of such a set-up for quantum computers.
In this paper experiments with single trapped ions are reviewed. They are performed with the aim of developing a new frequency standard and to perform cavity quantum electrodynamics experiments with single ions. For a new optical frequency standard we are investigating the 5s21S0 implied by 5s5p3P0 transition of a single trapped laser-cooled 115In(superscript + ion. This line with a natural linewidth of only 0.8 Hz is highly immune to systematic frequency shifts. For sideband laser cooling and fluorescence detection of the indium ion the 5s21S0 implied by 5s5p3P1 transition at 230.6 nm is used. Temperatures below 100 (mu) K and a mean vibrational quantum number <n><1 of the ion in the trap have been reached. For the clock transition a resolution of 1.3 multiplied by 10-13 (linewidth 170 Hz) has been obtained so far, limited by the short term frequency fluctuations of the clock laser. The absolute frequency of the 1S0 implied by 3P0 transition was measured by making a link to the reference frequency of the methane-stabilized HeNe laser using a frequency chain. In the second part of the paper the present status of the experiments on the ion trap laser are briefly described.