Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 9: Quantum Networks: Platforms and Components I
FM 9.3: Talk
Montag, 23. September 2019, 14:30–14:45, 1098
Remote two-Photon interference in the telecom C-band of frequency converted quantum dots — •Simone Luca Portalupi1, Jonas H. Weber1, Benjamin Kambs2, Jan Kettler1, Simon Kern1, Julian Maisch1, Hueseyin Vural1, Michael Jetter1, Christoph Becher2, and Peter Michler1 — 1IHFG-University of Stuttgart, IQST and SCoPE, Stuttgart, Germany — 2Fachrichtung Physik, Universität des Saarlandes, Saarbrücken, Germany
Nowadays, efforts are made to transfer quantum technology from laboratory-based demonstrations to real world applications, such as the implementation of quantum networks for the secure transmission of information over long distances. Within the required components, sources of non-classical light are of key importance. Semiconductor quantum dots are one of the most promising candidates for the generation of single, indistinguishable, and entangled photons. Currently, the best emitters are operating well inside the near infrared regime (∼780-900 nm), so not compatible with existing silica-based fibre networks. Here we make use of quantum frequency conversion (QFC) to change the wavelength of the photons emitted by two distinct quantum dots from ∼900 nm to ∼1550 nm. We perform two-photon interference between two remote emitters to prove one of the fundamental quantum operations needed in future quantum networks. We prove that the QFC does not modify the photon properties, making this approach very appealing in realistic long-distance quantum applications [1].
[1] J. H. Weber, et al. Nat. Nanotechnol. 14, 23 (2019).