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Photonic Quantum Computing Entanglement Theory Quantum Correlations

A quantum detector for photon entanglement

arXiv
Authors: J. Huwer, J. Ghosh, N. Piro, M. Schug, F. Dubin, J. Eschner

Year

2011

Paper ID

29889

Status

Preprint

Abstract Read

~2 min

Abstract Words

83

Citations

N/A

Abstract

We use a single trapped 40Ca+ ion as a resonant, polarization-sensitive absorber to detect and characterize the entanglement of tunable narrowband photon pairs from a spontaneous parametric down-conversion source. Single-photon absorption is marked by a quantum jump in the ion and heralded by coincident detection of the partner photon. For three polarization basis settings of absorption and detection of the herald, we find maximum coincidences always for orthogonal polarizations. The polarization entanglement is further evidenced by tomographic reconstruction of the biphoton quantum state.

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  • We use a single trapped 40Ca+ ion as a resonant, polarization-sensitive absorber to detect and characterize the entanglement of tunable narrowband photon pairs from a...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1111.1085 [2] arXiv https://arxiv.org/abs/1111.1085 [3] Publisher https://arxiv.org/abs/1111.1085

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