Wavelength-tunable sources of entangled photons interfaced with atomic vapours

Nature Communications
Rinaldo TrottaArmando Rastelli

Abstract

The prospect of using the quantum nature of light for secure communication keeps spurring the search and investigation of suitable sources of entangled photons. A single semiconductor quantum dot is one of the most attractive, as it can generate indistinguishable entangled photons deterministically and is compatible with current photonic-integration technologies. However, the lack of control over the energy of the entangled photons is hampering the exploitation of dissimilar quantum dots in protocols requiring the teleportation of quantum entanglement over remote locations. Here we introduce quantum dot-based sources of polarization-entangled photons whose energy can be tuned via three-directional strain engineering without degrading the degree of entanglement of the photon pairs. As a test-bench for quantum communication, we interface quantum dots with clouds of atomic vapours, and we demonstrate slow-entangled photons from a single quantum emitter. These results pave the way towards the implementation of hybrid quantum networks where entanglement is distributed among distant parties using optoelectronic devices.

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Citations

Nov 26, 2016·Nature Communications·Simone Luca PortalupiIlja Gerhardt
May 27, 2017·Nature Communications·Daniel HuberRinaldo Trotta
Nov 8, 2017·Nature Nanotechnology·Pascale SenellartAndrew White
Mar 28, 2017·Reports on Progress in Physics·Adeline OrieuxSara Ducci
Sep 1, 2017·Nature Communications·Ali W ElshaariKlaus D Jöns
May 21, 2019·Physical Review Letters·Łukasz DusanowskiSven Höfling
Dec 15, 2018·Optics Letters·Stephen Hughes, Girish S Agarwal
May 16, 2019·Nature Materials·Massimo GurioliStefano Sanguinetti
Dec 18, 2018·Science Advances·Marcus ReindlRinaldo Trotta
Mar 21, 2021·Science Advances·Francesco Basso BassetRinaldo Trotta
May 20, 2017·ACS Photonics·Huiying HuangArmando Rastelli
Nov 27, 2018·Nano Letters·Ali W ElshaariVal Zwiller
Oct 20, 2018·Nano Letters·Lorenzo LeandroNika Akopian
Sep 6, 2019·Nano Letters·Oliver IffChristian Schneider
Feb 7, 2020·ACS Photonics·Thomas LettnerVal Zwiller
Jan 25, 2019·The Journal of Physical Chemistry Letters·Konstantin E DorfmanShaul Mukamel

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