Quantum resources outperform classical ones for certain communication and computational tasks. Remarkably, in some cases, the quantum advantage cannot be improved using hypothetical postquantum resources. A class of tasks with this property can be singled out using graph theory. Here we report the experimental observation of an impossible-to-beat quantum advantage on a four-dimensional quantum system defined by the polarization and orbital angular momentum of a single photon. The results show pristine evidence of the quantum advantage and are compatible with the maximum advantage allowed using postquantum resources.
Experimental Observation of Impossible-to-Beat Quantum Advantage on a Hybrid Photonic System / Nagali, Eleonora; D'Ambrosio, Vincenzo; Sciarrino, Fabio; Cabello, Adan. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 108:9(2012), p. 090501. [10.1103/physrevlett.108.090501]
Experimental Observation of Impossible-to-Beat Quantum Advantage on a Hybrid Photonic System
NAGALI, ELEONORA;D'AMBROSIO, VINCENZO;SCIARRINO, Fabio;
2012
Abstract
Quantum resources outperform classical ones for certain communication and computational tasks. Remarkably, in some cases, the quantum advantage cannot be improved using hypothetical postquantum resources. A class of tasks with this property can be singled out using graph theory. Here we report the experimental observation of an impossible-to-beat quantum advantage on a four-dimensional quantum system defined by the polarization and orbital angular momentum of a single photon. The results show pristine evidence of the quantum advantage and are compatible with the maximum advantage allowed using postquantum resources.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
