Simple optical measurement of the overlap and fidelity of quantum states: An experiment

Details Simple optical measurement of the overlap and fidelity of quantum states: An experiment Simple optical measurement of the overlap and fidelity of quantum states: An experiment

2002-08-14

arxiv.org/abs/quant-ph/0208091v1

Phys. Lett. A 310, 95 (2003).

Physics

Quantum Physics

4 pages, 6 figures

Scientific paper

10.1016/S0375-9601(03)00262-7

We present the experimental results of measurements of the overlap of both pure and mixed polarization states of photons. The fidelity and purity of mixed states were also measured. The experimental apparatus exploits the fact that a beam splitter can distinguish the singlet Bell state from the other Bell states, i.e., it realizes projections into the symmetric and antisymmetric subspaces of photons' Hilbert space.

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