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Projection of Two Biphoton Qutrits onto a Maximally Entangled State

Assaf Halevy, E. Megidish, Tomer Shacham, Liat Dovrat, H. S. Eisenberg

Published Jan 1, 2011• 1 citation
Publisher

Abstract

We propose and demonstrate the projection of two quantum three state systems (qutrits) onto a maximally entangled state. The qutrits are represented by the polarization of biphotons - pairs of indistinguishable photons.
DOI
10.1364/qels.2011.qtht4

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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.
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