caa a22 4500 445886463 CHVBK 20180317145601.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s11128-011-0304-4 doi (NATIONALLICENCE)springer-10.1007/s11128-011-0304-4 Using light-assisted collisions to consistently isolate individual atoms for quantum information processing [Elektronische Daten] [Tzahi Grünzweig, Matthew McGovern, Andrew Hilliard, Mikkel Andersen] We count a small number of atoms trapped in an optical microtrap, using fluorescence induced by a standing wave of blue-detuned light. Blue-detuned light limits losses from light-assisted collisions, allowing us to manipulate the trapped atoms further. When a pair of trapped atoms is detected in this way, we apply a tailored laser light pulse to induce light assisted-collisions. We directly observe that these collisions lead to either one or both atoms being lost from the microtrap. By optimizing the frequency and intensity of the laser beam inducing the light-assisted collisions, one atom loss can be made to dominate over pair loss. We demonstrate that in a microtrap occupied by ~50 atoms, this optimized light-assisted collision pulse can eject all but one atom efficiently. This method may be used to prepare many singly occupied microtraps for a neutral atom based quantum computation device. Springer Science+Business Media, LLC, 2011 Single atom nationallicence Optical trap nationallicence Light-assisted collisions nationallicence Grünzweig Tzahi Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut McGovern Matthew Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut Hilliard Andrew Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut Andersen Mikkel Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut Quantum Information Processing Springer US; http://www.springer-ny.com 10/6(2011-12-01), 925-940 1570-0755 10:6<925 2011 10 11128 https://doi.org/10.1007/s11128-011-0304-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11128-011-0304-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grünzweig Tzahi Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut NATIONALLICENCE 700 1- McGovern Matthew Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut NATIONALLICENCE 700 1- Hilliard Andrew Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut NATIONALLICENCE 700 1- Andersen Mikkel Department of Physics, Jack Dodd Centre for Quantum Technology, University of Otago, 9016, Dunedin, New Zealand aut NATIONALLICENCE 773 0- Quantum Information Processing Springer US; http://www.springer-ny.com 10/6(2011-12-01), 925-940 1570-0755 10:6<925 2011 10 11128 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer