High-concurrence time-bin entangled photon pairs from optimized Bragg-reflection waveguides

Semiconductor Bragg-reflection waveguides are well-established sources of correlated photon pairs as well as promising candidates for building up integrated quantum optics devices. Here, we use such a source with optimized non-linearity for preparing time-bin entangled photons in the telecommunicati...

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Bibliographic Details
Published in:arXiv.org 2018-04
Main Authors: Chen, Huan, Auchter, Silke, Prilmüller, Maximilian, Schlager, Alexander, Kauten, Thomas, Laiho, Kaisa, Pressl, Benedikt, Suchomel, Holger, Kamp, Martin, Höfling, Sven, Schneider, Christian, Weihs, Gregor
Format: Article
Language:English
Subjects:
Entanglement
Linearity
Photons
Quantum optics
Quantum theory
Wave reflection
Waveguides
Online Access:Get full text
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Summary:Semiconductor Bragg-reflection waveguides are well-established sources of correlated photon pairs as well as promising candidates for building up integrated quantum optics devices. Here, we use such a source with optimized non-linearity for preparing time-bin entangled photons in the telecommunication wavelength range. By taking advantage of pulsed state preparation and efficient free-running single-photon detection, we drive our source at low pump powers, which results in a strong photon-pair correlation. The tomographic reconstruction of the state's density matrix reveals that our source exhibits a high degree of entanglement. We extract a concurrence of \(88.9\pm 1.8\%\) and a fidelity of \(94.2 \pm 0.9\%\) with respect to a Bell state.
ISSN:2331-8422
DOI:10.48550/arxiv.1804.11108