Quantum Navigation: The Future of Positioning

Reliance on global navigation satellite systems poses a growing security risk, as signals can easily be compromised by interference or tampering. Quantum technologies offer a promising solution to this problem. By utilizing physical environmental characteristics or high-precision inertial measurements, they enable navigation that does not rely on external signals. Two current developments mark a technological turning point for the resilience of unmanned systems.

The World as a Precise Reference Point

In quantum map matching, natural fluctuations in gravity or the magnetic field serve as a physical fingerprint of a location. Quantum sensors such as gravimeters and magnetometers detect these minimal variations and compare them with stored maps to determine the exact position. A key advantage of this technology is the low drift of the sensors, which ensures sustained accuracy.

QinetiQ, together with partners such as Imperial College London and Transport for London, demonstrated that this method is practical. In the London Underground, the use of quantum magnetometers was successfully tested to precisely track the position of trains in an environment without satellite reception. This technology offers a robust alternative for scenarios in which GNSS signals are blocked or unreliable.

Precision Without Drift

Conventional inertial navigation systems suffer from the problem of drift: small measurement errors accumulate over time, leading to significant deviations during longer operations. Quantum inertial sensors promise a significant improvement here, as they exhibit significantly lower drift. This enables precise positioning over longer periods of time without the need for external correction.

The technology’s maturity has already been tested in flight. In collaboration with Infleqtion, QinetiQ integrated a quantum clock and a quantum inertial sensor into a test aircraft. The successful operation of these components underscores the potential for integrating quantum systems into comprehensive navigation architectures. Even though the technology is not yet ready for widespread everyday use, it represents an essential building block for operations in complex or contested environments.

Unmanned systems often operate in low-signal environments or are exposed to the risk of GNSS spoofing and jamming in safety-critical scenarios. The integration of quantum sensors could massively increase the operational autonomy of drones and enable missions that were previously considered unfeasible due to a lack of navigational reliability. Furthermore, the miniaturization of these sensors opens up new possibilities for the next generation of UAVs. Manufacturers who invest early in the integration of quantum inertial systems will secure a decisive competitive advantage in the development of systems for use in demanding environments. The technology thus marks the transition from purely signal-based navigation to physically autonomous navigation.