Projection of two biphoton qutrits onto a maximally entangled state

Details Projection of two biphoton qutrits onto a maximally entangled state Projection of two biphoton qutrits onto a maximally entangled state

2010-11-29

arxiv.org/abs/1011.6202v2

Phys. Rev. Lett. 106, 130502 (2011)

Physics

Quantum Physics

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevLett.106.130502

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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