Physics – Quantum Physics
Scientific paper
2006-09-11
Phys. Rev. A 75, 042317 (2007)
Physics
Quantum Physics
4 pages, v2, comments added
Scientific paper
10.1103/PhysRevA.75.042317
A complete and deterministic Bell state measurement was realized by a simple linear optics experimental scheme which adopts 2-photon polarization-momentum hyperentanglement. The scheme, which is based on the discrimination among the single photon Bell states of the hyperentangled state, requires the adoption of standard single photon detectors. The four polarization Bell states have been measured with average fidelity $F=0.889\pm0.010$ by using the linear momentum degree of freedom as the ancilla. The feasibility of the scheme has been characterized as a function of the purity of momentum entanglement.
Barbieri Marco
Martini Francesco de
Mataloni Paolo
Vallone Giuseppe
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