We report on the experimental realization of a four-qubit linear cluster state via two photons entangled both in polarization and linear momentum. This state was investigated by performing tomographic measurements and by evaluating an entanglement witness. By use of this state we carried out a novel nonlocality proof, the so-called "stronger two observer all-versus-nothing" test of quantum nonlocality.
Realization and characterization of a two-photon four-qubit linear cluster state / Vallone, G.; Pomarico, E.; Mataloni, P.; De Martini, F.; Berardi, Vincenzo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 98:18(2007). [10.1103/PhysRevLett.98.180502]
Realization and characterization of a two-photon four-qubit linear cluster state
BERARDI, Vincenzo
2007-01-01
Abstract
We report on the experimental realization of a four-qubit linear cluster state via two photons entangled both in polarization and linear momentum. This state was investigated by performing tomographic measurements and by evaluating an entanglement witness. By use of this state we carried out a novel nonlocality proof, the so-called "stronger two observer all-versus-nothing" test of quantum nonlocality.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
