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.

4 pages, 3 figures, published version

References in corpus (4)

• Multiphoton path entanglement by non-local bunching
• Optical one-way quantum computing with a simulated valence-bond solid
• Optical implementation of the encoding of two qubits to a single qutrit
• Simple and secure quantum key distribution with biphotons

Cited by in corpus (4)

• Detecting mixedness of qutrit systems using the uncertainty relation
• Heralded generation of symmetric and asymmetric entangled qudits with weak cross-Kerr nonlinearity
• Limits to multipartite entanglement generation with bosons and fermions
• Efficient and flexible generation of entangled qudits with cross phase modulation