Hamburg 2009 – scientific programme
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SYDD: Defect centers in diamond for applications in quantum optics and nanophotonics
SYDD 2: Defect centers in diamond for applications in quantum optics and nanophotonics II
SYDD 2.4: Talk
Friday, March 6, 2009, 15:30–15:45, Audi-B
Deterministic ultracold ion source targeting the Heisenberg limit — •Kilian Singer, W. Schnitzler, R. Fickler, N.M. Linke, and F. Schmidt-Kaler — Universität Ulm, Institut für Quanteninformationsverarbeitung, Albert-Einstein-Allee 11, D-89069 Ulm
We have realized a universal deterministic single ion source on the basis of an ion trap applicable to a wide range of elements and molecules [1,2]. Initially, cold 40Ca+ ion crystals are trapped within a segmented linear trap. Those ions are then deterministically extracted and detected with an efficiency of 90% at a distance of 29cm. For single ion extraction we measured a mean velocity of 19.47km/s with a 1σ-spread of only 6.3m/s and a beam divergence of 600µrad. We have also demonstrated the extraction of mixed ion crystals containing other dopant ions. Ion ray-tracing simulations predict that it is possible to focus down the ion beam to nm resolution with a simple Einzel-lens. This technique can e.g. be applied to generate color centers in diamond or to implant P into Si. Both systems provide a possible way for the realization of a solid state quantum computer [3,4]. In addition, the electrical properties of semiconductor devices can be greatly enhanced by the deterministic implantation of single ions [5].
[1] J. Meijer et al., Appl. Phys. A 83, 321 (2006)
[2] J. Meijer et al., Appl. Phys. A 91, 567 (2008)
[3] F. Jelezko et al., Phys. Rev. Lett. 93, 130501 (2004)
[4] B. Kane, Nature 393, 133 (1998)
[5] T. Shinada et al., Nature 437, 1128 (2005)