[1] INFN, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy
[2] NQSTI, Natl Quantum Sci & Technol Inst, Piazzale Aldo Moro 7, I-00185 Rome, Italy
[3] INFN, Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy
[4] Univ Padua, CNISM unit, via Marzolo 8, I-35131 Padua, Italy
[5] Univ Padua, Dept Phys & Astron, via Marzolo 8, I-35131 Padua, Italy
[6] INFN, Sez Ferrara, Via Saragat 1, I-44122 Ferrara, Italy
[7] Univ Ferrara, Dept Phys & Earth Sci, via Saragat 1, I-44122 Ferrara, Italy
[8] CNRS, Inst Rech Chim Paris, 11 rue Pierre & Marie Curie, F-75231 Paris 05, France
[9] Univ Siena, Dept Phys Sci, Via Roma 56, I-53100 Siena, Italy
[10] INFN, Sez Pisa, Via Filippo Buonarroti 3, I-56127 Pisa, Italy
[11] Univ Padua, Dept Ind Engn, via Venezia 1, I-35131 Padua, Italy
[12] Univ Padua, Dept Informat Engn, Via Gradenigo 6-b, I-35131 Padua, Italy