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Experimental realization of a programmable quantum-state discriminator and a phase-covariant quantum multimeter

par Soubusta, Jan;Černoch, Antonín;Fiurasek, Jaromir ;Dušek, Miloslav
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 69, 5 A, page (052321-1)
Publication Publié, 2004-05

Article révisé par les pairs

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Résumé :

An optical implementation of a programmable quantum-state discriminator and a phase-covariant quantum multimeter was presented. Both programmable detectors involved two qubits: one data qubit and one program qubit. The qubits were encoded into polarization states of single photons and the required photon pairs were generated by means of spontaneous parametric down-conversion. The results show that the measurement on the data qubit can be quite efficiently controlled by the quantum state of the program qubit.