Media type: E-Article Title: Determining the quantum expectation value by measuring a single photon Contributor: Piacentini, Fabrizio; Avella, Alessio; Rebufello, Enrico; Lussana, Rudi; Villa, Federica; Tosi, Alberto; Gramegna, Marco; Brida, Giorgio; Cohen, Eliahu; Vaidman, Lev; Degiovanni, Ivo P.; Genovese, Marco Published: Springer Science and Business Media LLC, 2017 Published in: Nature Physics, 13 (2017) 12, Seite 1191-1194 Language: English DOI: 10.1038/nphys4223 ISSN: 1745-2473; 1745-2481 Origination: Footnote: