Quantum teleportation and entanglement swapping with linear optics logic gates
نویسندگان
چکیده
We report on the usage of a linear optics phase gate for distinguishing all four Bell states simultaneously in a quantum teleportation and entanglement swapping protocol. This is demonstrated by full state tomography of the one and two qubit output states of the two protocols, yielding average state fidelities of about 0.83 and 0.77, respectively. In addition, the performance of the teleportation channel is characterised by quantum process tomography. The non-classical properties of the entanglement swapping output states are further confirmed by the violation of a CHSHtype Bell inequality of 2.14 on average. PACS numbers: 03.67.-a, 03.67.Hk, 03.65.Ud, 42.65.Lm Quantum teleportation and entanglement swapping 2
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