Complete and Deterministic discrimination of polarization Bell state assisted by momentum entanglement

Details Complete and Deterministic discrimination of polarization Bell state assisted by momentum entanglement Complete and Deterministic discrimination of polarization Bell state assisted by momentum entanglement

2006-09-11

arxiv.org/abs/quant-ph/0609080v2

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.

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