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Photonic Quantum Computing

Certifying the presence of a photonic qubit by splitting it in two

arXiv
Authors: Evan Meyer-Scott, Daniel McCloskey, Klaudia Gołos, Jeff Z. Salvail, Kent A. G. Fisher, Deny Hamel, Adán Cabello, Kevin J. Resch, Thomas Jennewein

Year

2015

Paper ID

26684

Status

Preprint

Abstract Read

~2 min

Abstract Words

82

Citations

N/A

Abstract

We present an implementation of photonic qubit precertification that performs the delicate task of detecting the presence of a flying photon without destroying its qubit state, allowing loss-sensitive quantum cryptography and tests of nonlocality even over long distance. By splitting an incoming single photon in two via parametric down-conversion, we herald the photon's arrival from an independent photon source while preserving its quantum information with up to 92.3pm0.6 % fidelity. With reduced detector dark counts, precertification will be immediately useful in quantum communication.

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  • We present an implementation of photonic qubit precertification that performs the delicate task of detecting the presence of a flying photon without destroying its qubit state...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1510.04531 [2] arXiv https://arxiv.org/abs/1510.04531 [3] Publisher https://arxiv.org/abs/1510.04531

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