Experimental Realization of a Photonic Bell-State Analyzer

Details Experimental Realization of a Photonic Bell-State Analyzer Experimental Realization of a Photonic Bell-State Analyzer

2004-10-29

arxiv.org/abs/quant-ph/0410244v2

Physical Review A 72 010302(R) (2005)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.72.010302

Efficient teleportation is a crucial step for quantum computation and quantum networking. In the case of qubits, four different entangled Bell states have to be distinguished. We have realized a probabilistic, but in principle deterministic, Bell-state analyzer for two photonic quantum bits by the use of a nondestructive controlled-NOT gate based on entirely linear optical elements. This gate was capable of distinguishing between all of the Bell states with higher than 75% fidelity without any noise substraction due to utilizing quantum interference effects.

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