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Scalable Quantum Photonic Networks

Total Cost €


EC-Contrib. €






Project "SCALE" data sheet

The following table provides information about the project.


Organization address
address: NORREGADE 10
postcode: 1165

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 Denmark [DK]
 Project website
 Total cost 2˙499˙981 €
 EC max contribution 2˙499˙981 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-ADG
 Funding Scheme ERC-ADG
 Starting year 2015
 Duration (year-month-day) from 2015-12-01   to  2020-11-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    KOBENHAVNS UNIVERSITET DK (KOBENHAVN) coordinator 2˙499˙981.00


 Project objective

It is an outstanding challenge in quantum physics of today to scale small proof-of-concept experimental demonstrations into larger quantum networks. In the last decade, solid-state photonic systems have matured significantly, and an ambitious research project on such scaling seems viable. With the present proposal we intend to take up this challenge and exploit single quantum dots in photonic-crystal nanostructures as a deterministic photon-emitter interface for scalable quantum architectures.

The project objectives are threefold. We will explore: 1) Deterministic single-photon sources for quantum simulations, 2) A giant photon nonlinearity for quantum-information processing, 3) The deterministic interfacing of multiple quantum dots.

In 1) we will exploit our recently developed deterministic single-photon source to produce a spatially multiplexed array of single photons (prospectively of 10 photons or more). This source will be used for quantum simulations. Area 2) exploits a single quantum dot in a photonic-crystal waveguide as a giant nonlinearity. The quantum dot will be operated either as a passive nonlinear scatterer or actively controlled. The nonlinearity will enable constructing a deterministic CNOT gate for photons or a single-photon transistor. Finally, 3) concerns the coupling of two or more quantum dots by an extended dipole-dipole interaction that is mediated by the photonic-crystal waveguide. The fundamental limits for the size and complexity of such a quantum photonic network will be explored.

The present project focus on overcoming the fundamental obstacles that photonic quantum-information processing applications have been suffering from, i.e., probabilistic single-photon emission and weak nonlinearities. The successful accomplishment of the project could elevate quantum photonics to a frontrunner technology for scalable quantum-information processing.


year authors and title journal last update
List of publications.
2018 Alisa Javadi, Sahand Mahmoodian, Immo Söllner, Peter Lodahl
Numerical modeling of the coupling efficiency of single quantum emitters in photonic-crystal waveguides
published pages: 514, ISSN: 0740-3224, DOI: 10.1364/josab.35.000514
Journal of the Optical Society of America B 35/3 2019-07-04
2018 Henri Thyrrestrup, Gabija Kiršanskė, Hanna Le Jeannic, Tommaso Pregnolato, Liang Zhai, Laust Raahauge, Leonardo Midolo, Nir Rotenberg, Alisa Javadi, Rüdiger Schott, Andreas D. Wieck, Arne Ludwig, Matthias C. Löbl, Immo Söllner, Richard J. Warburton, Peter Lodahl
Quantum Optics with Near-Lifetime-Limited Quantum-Dot Transitions in a Nanophotonic Waveguide
published pages: 1801-1806, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.7b05016
Nano Letters 18/3 2019-07-04
2017 Leonardo Midolo, Sofie L. Hansen, Weili Zhang, Camille Papon, Rüdiger Schott, Arne Ludwig, Andreas D. Wieck, Peter Lodahl, Søren Stobbe
Electro-optic routing of photons from a single quantum dot in photonic integrated circuits
published pages: 33514, ISSN: 1094-4087, DOI: 10.1364/oe.25.033514
Optics Express 25/26 2019-07-04
2018 P. Tighineanu, C. L. Dreeßen, C. Flindt, P. Lodahl, A. S. Sørensen
Phonon Decoherence of Quantum Dots in Photonic Structures: Broadening of the Zero-Phonon Line and the Role of Dimensionality
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.120.257401
Physical Review Letters 120/25 2019-07-04
2018 Peter Lodahl
Quantum-dot based photonic quantum networks
published pages: 13001, ISSN: 2058-9565, DOI: 10.1088/2058-9565/aa91bb
Quantum Science and Technology 3/1 2019-07-04
2018 Alisa Javadi, Dapeng Ding, Martin Hayhurst Appel, Sahand Mahmoodian, Matthias Christian Löbl, Immo Söllner, Rüdiger Schott, Camille Papon, Tommaso Pregnolato, Søren Stobbe, Leonardo Midolo, Tim Schröder, Andreas Dirk Wieck, Arne Ludwig, Richard John Warburton, Peter Lodahl
Spin–photon interface and spin-controlled photon switching in a nanobeam waveguide
published pages: 398-403, ISSN: 1748-3387, DOI: 10.1038/s41565-018-0091-5
Nature Nanotechnology 13/5 2019-07-04
2017 Sahand Mahmoodian, Kasper Prindal-Nielsen, Immo S?llner, S?ren Stobbe, Peter Lodahl
Engineering chiral light?matter interaction in photonic crystal waveguides with slow light
published pages: 43, ISSN: 2159-3930, DOI: 10.1364/OME.7.000043
Optical Materials Express 7/1 2019-07-04
2017 P. Lodahl, S. Mahmoodian, S. Stobbe, P. Schneeweiss, J. Volz, A. Rauschenbeutel, H. Pichler, and P. Zoller
Chiral quantum optics
published pages: 473, ISSN: 0028-0836, DOI: 10.1038/nature21037
Nature 541 2019-07-04
2017 Rapha?l S. Daveau, Krishna C. Balram, Tommaso Pregnolato, Jin Liu, Eun H. Lee, Jin D. Song, Varun Verma, Richard Mirin, Sae Woo Nam, Leonardo Midolo, S?ren Stobbe, Kartik Srinivasan, Peter Lodahl
Efficient fiber-coupled single-photon source based on quantum dots in a photonic-crystal waveguide
published pages: 178, ISSN: 2334-2536, DOI: 10.1364/OPTICA.4.000178
Optica 4/2 2019-07-04

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