Quantum networks based on single photons (C02)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2008 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 43659573

The project addresses the generation of single photons and photon pairs, as well as their application in quantum information processing. Three objectives have been identified: (1) High-quality single photons are to be generated via resonant excitation of single quantum dots and resonant scattering in the Heitler regime. (2) We will generate time-bin entangled photons from single quantum dots. Stability and versatility of time-bin entanglement will be shown by means of different types of photon conversions. (3) A novel time/frequency protocol for quantum key distribution shall be demonstrated over a 500-m free-space link operated by HHI between two buildings in the city centre.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 787: Semiconductor Nanophotonics: Materials, Models, Devices
• Applicant Institution: Technische Universität Berlin
• Co-Applicant Institution: Fraunhofer-Institut für Nachrichtentechnik; Heinrich-Hertz-Institut; Humboldt-Universität zu Berlin
• Project Heads: Professor Dr. Oliver Benson; Professor Dr. Ronald Freund, since 1/2016; Dr. Colja Schubert, until 12/2015