title: Projection of two biphoton qutrits onto a maximally entangled state.
abstract: Bell state measurements, in which two quantum bits are projected onto a maximally entangled state, are an essential component of quantum information science. We propose and experimentally demonstrate the projection of two quantum systems with three states (qutrits) onto a generalized maximally entangled state. Each qutrit is represented by the polarization of a pair of indistinguishable photons-a biphoton. The projection is a joint measurement on both biphotons using standard linear optics elements. This demonstration enables the realization of quantum information protocols with qutrits, such as teleportation and entanglement swapping.
authors.affiliation: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Halevy
authors.forename: E
authors.initials: E
authors.lastname: Megidish
authors.forename: T
authors.initials: T
authors.lastname: Shacham
authors.forename: L
authors.initials: L
authors.lastname: Dovrat
authors.forename: H S
authors.initials: HS
authors.lastname: Eisenberg