Kilian Singer (F. Schmidt-Kaler - Group)
Deterministic ultracold ion source targeting the Heisenberg limit
Within the next 5 years the increasing miniaturization of semiconductor devices might lead to dopant counts of less than one hundred in the channel regions of field effect transistors[1]. Conventional dopant techniques would then lead to high statistical fluctuations of dopants causing device parameters to vary at an unacceptable level. Ultimately, at the single atom limit, quantum devices like future quantum processors and future nano solid state devices call for new deterministic production techniques with nanometer. Based on a segmented ion trap with mK laser cooled ions we have realized a novel deterministic single ion source which can operate with a huge range of sympathetically cooled ion species, isotopes or ionic molecules. We have deterministically extracted a predetermined number of ions on demand and have measured a longitudinal velocity uncertainty of 6.3m/s and a spatial beam divergence of 600μrad. We show in numerical simulations that if the ions are cooled to the motional ground state (Heisenberg limit) nanometer spatial resolution can be achieved [2,3].
[1] Semiconductor Industry Association. The International Technology Roadmap for Semiconductors, 2007 edition. SEMATECH:Austin, TX, 2007.
[2] W. Schnitzler, N. M. Linke, R. Fickler, J. Meijer, F. Schmidt-Kaler, and K. Singer, Phys. Rev. Lett. 102, 070501 (2009) 253001.
[3] R. Fickler, W. Schnitzler, Norbert M. Linke, F. Schmidt-Kaler, K. Singer, to be published in Jour. of Mod. Optics (2009), arXiv:0903.3425v3.
