Fault-tolerant Hahn-Ramsey interferometry with pulse sequences of alternating detuning

Nikolay V. Vitanov,1 Timm F. Gloger,2 Peter Kaufmann,2 Delia Kaufmann,2 Thomas Collath,2 M. Tanveer Baig,2 Michael Johanning,2 and Christof Wunderlich2 1Department of Physics, St Kliment Ohridski University of Sofia, 5 James Bourchier Boulevard, 1164 Sofia, Bulgaria 2Department Physik, Naturwissenschaftlich-Technische Fakultat, Universitat Siegen, 57068 Siegen, Germany (Received 29 August 2014; published 23 March 2015)