Daniel Nigg, Julio T. Barreiro1,∗ Philipp Schindler, Masoud Mohseni3,† Thomas Monz, Michael Chwalla, Markus Hennrich, and Rainer Blatt Institut fur Experimentalphysik, Universitat Innsbruck, Technikerstrasse 25, A–6020 Innsbruck, Austria Institut fur Quantenoptik und Quanteninformation der Osterreichischen Akademie der Wissenschaften, Technikerstrasse 21a, A–6020 Innsbruck, Austria Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts 02139, USA (Dated: Monday 14 May, 2012)