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Scalable Quantum Photonics with Ultra Bright Photon Sources

Total Cost €


EC-Contrib. €






Project "SQuaPh" data sheet

The following table provides information about the project.


Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Project website
 Total cost 173˙076 €
 EC max contribution 173˙076 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2015
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2016
 Duration (year-month-day) from 2016-11-01   to  2018-10-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The development of quantum networks relies on true single-photon sources and deterministic quantum logic gates. Photons are the most promising flying qubits, capable to propagate long distances without decoherence. However, until now, quantum communications protocols and optical quantum computation have been implemented using defective single-photon sources and probabilistic quantum gates. For a long time, the best single-photon sources have been heralded non-linear crystals where photon-pairs are generated. Such sources can present high coherence properties although they are intrinsically limited to a very low photon flux.

This project builds up on major steps obtained in the host team, Laboratoire de Photonique et de Nanostructures, in terms of true single-photon generation and control. By deterministically inserting a quantum dot (QD) in a semiconductor microcavity pillar, the host team fabricated photon sources with quantum properties as good as the currently used sources, but with an unprecedented brightness of 2 orders of magnitude larger. The cavity not only enhances the interaction of the incident photons with the QD state but also the subsequent photon extraction of the device. The Purcell effect diminishes the decoherence processes, constituting an ultrabright source of highly indistinguishable, single-photons.

Based on the unique technological, experimental and conceptual knowledge developed by the host team, and on the background of the applicant, our successive objectives is to realize scalable quantum entanglement: to entangle two-photon states with our ultrabright QD-cavity systems at high rates, to use them to perform high fidelity teleportation with long coherence times between 2 different sources, and finally to controllably swap the entanglement between 2 entangled photon-pairs.


year authors and title journal last update
List of publications.
2017 Lorenzo De Santis, Carlos Antón, Bogdan Reznychenko, Niccolo Somaschi, Guillaume Coppola, Jean Senellart, Carmen Gómez, Aristide Lemaître, Isabelle Sagnes, Andrew G. White, Loïc Lanco, Alexia Auffèves, Pascale Senellart
A solid-state single-photon filter
published pages: 663-667, ISSN: 1748-3387, DOI: 10.1038/NNANO.2017.85
Nature Nanotechnology 12/7 2019-05-25
2017 Carlos Antón, Paul Hilaire, Christian A. Kessler, Justin Demory, Carmen Gómez, Aristide Lemaître, Isabelle Sagnes, Norberto Daniel Lanzillotti-Kimura, Olivier Krebs, Niccolo Somaschi, Pascale Senellart, Loïc Lanco
Tomography of the optical polarization rotation induced by a single quantum dot in a cavity
published pages: 1326, ISSN: 2334-2536, DOI: 10.1364/optica.4.001326
Optica 4/11 2019-05-25
2018 P. Hilaire, C. Antón, C. Kessler, A. Lemaître, I. Sagnes, N. Somaschi, P. Senellart, L. Lanco
Accurate measurement of a 96% input coupling into a cavity using polarization tomography
published pages: 201101, ISSN: 0003-6951, DOI: 10.1063/1.5026799
Applied Physics Letters 112/20 2019-05-25

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