Quantum communication

Quantum communication is a key building block for future distributed quantum networks, where photons carry information between quantum devices, sensors and secure network nodes. It also addresses an urgent security challenge: future quantum computers may weaken today’s cryptographic methods, while critical infrastructure needs long-term protection already now.

One of the first practical applications of these networks is quantum key distribution (QKD), where encryption keys are exchanged using quantum states of light. Since any attempt to intercept the signal changes the quantum state, eavesdropping can be detected. QKD can therefore add a physical layer of security to communication networks and complement post-quantum cryptography and existing cybersecurity methods.

From research to application

RISE work includes fibre-optic quantum communication, quantum photonics and components that can be integrated into existing infrastructure. RISE has developed a low-loss all-fibre phase modulator used in a prototype for all-optical fibre memory, where individual photons test storage time and preservation of encoded quantum states.

RISE will also deploy further infrastructure for quantum-secure communication within NordicQCI – Nordic Quantum Communication Infrastructure, a project coordinated by RISE that will connect Sweden, Finland and Estonia through cross-border quantum links. This work is closely linked to RISE’s broader activities in quantum-safe communication, including the migration towards quantum-secure IT systems for sensitive data such as health data.