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arXiv · 1011.6202

Projection of two biphoton qutrits onto a maximally entangled state

A. Halevy·E. Megidish·T. Shacham·L. Dovrat·H. S. Eisenberg
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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.

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A. Halevy, E. Megidish, T. Shacham, L. Dovrat, H. S. Eisenberg. 2011-03-30. Projection of two biphoton qutrits onto a maximally entangled state. https://doi.org/10.1103/physrevlett.106.130502

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