Fraunhofer-Gesellschaft
Fraunhofer-Gesellschaft

Quantum Communications

Quantum communication applies the principles of quantum mechanics, such as quantum entanglement and quantum superposition, to transmit information in a manner that is virtually tap-proof. The key idea behind this is quantum key distribution (QKD), where two parties share a secure key. Any attempt to listen in on their communication can be detected immediately due to deviations in the statistical distribution. Commercial applications have been given the go-ahead and the first customers are testing the technologies. Pilot projects such as the QuNet initiative link together network nodes at multiple locations in Berlin. Researchers are also looking at quantum repeaters and satellite-based technology to enable quantum communication over long distances.

Where does quantum communication come into play?

Secure communication is essential in many areas: Keeping government and military communication virtually tap-proof is one such example. Banks and financial institutions can make use of quantum communication to ensure secure transactions and data transfers, and the technology can be used to achieve significant improvements in the protection of sensitive patient data in the healthcare sector.

Insights into Fraunhofer research

 

© Fraunhofer IOF

Highly secure communication networks for the digital future

The QuNET research initiative lays the foundation for secure and robust IT networks that are equipped to withstand the cyberattacks of tomorrow. Researchers are developing technologies for fiber and free-beam links, as well as single-photon sources and detectors, which are linked to form an overall concept. They have already established a network of this kind by conducting key experiments in Jena and Berlin.

 

© Fraunhofer IOF

Existing fiber optic networks are becoming quantum-ready

The Q-net-Q research project aims to integrate quantum key distribution (QKD) for highly secure data transmission into existing fiber optic networks. This technology is initially being tested with a view to sensitive applications such as the secure transmission of patient data in order to improve medical care in rural regions in particular. Future plans include the expansion of a Europe-wide quantum communication network. A long-distance QKD link between Berlin and Frankfurt am Main via Erfurt is currently under construction.

 

An intercontinental quantum communication network

Together with partners, Fraunhofer is developing an intercontinental quantum communication network between Germany and Canada, which transfers entangled photons via satellites. The Hyperspace project focuses on high-dimensional entanglement and robust quantum key distribution.

 

© Fraunhofer ILT

The internet of the future

In the future, quantum processors could also be connected in a network to create more distributed computing power. An international team of researchers, with the involvement of Fraunhofer, is working on the quantum internet and has established a network link between quantum processors over long distances.

 

© Fraunhofer ILT

Interview: “Strategic approach to the future market for quantum technologies”

In this interview, Dr. Bernd Jungbluth from Fraunhofer ILT in Aachen talks about the technological potential and wow factor that quantum technology brings and provides insights into the research activities taking place at his institute and in the state of North Rhine-Westphalia.

 

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Innovation Hub for quantum communication

The aim of the Umbrella Project for Quantum Communication (SQuaD) in the Innovation Hub is to establish a central point of contact for quantum communication expertise and infrastructure in Germany. To achieve this, research and industry stakeholders are being brought together and partners’ existing research structures are being expanded into publicly available testbeds for quantum communication technology.

 

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Chip-based generation of random numbers

The aim in this case is for a compact chip to generate random numbers at high speed based on quantum photonic effects for cryptographic key generation. This could be used to secure the communication systems of authorities, banks, critical infrastructures and the Internet of Things.