1. Department of Physics, Universitat Politècnica de Catalunya 1 , Rambla Sant Nebridi 22, 08222 Terrassa, Barcelona, Spain
2. Department of Information Engineering, University of Brescia 2 , Via Branze 38, 25123 Brescia, Italy
3. PeopleTec, Inc. 3 , 4901-I Corporate Dr., Huntsville, Alabama 35805, USA
4. Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité & CNRS 4 , 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
5. Aviation and Missile Center, U.S. Army CCDC 5 , Redstone Arsenal, Alabama 35898-5000, USA