Gradiant will showcase developments in quantum key distribution and precision sensing at New Space España in Vigo on September 24 and 25, bringing together the aerospace innovation ecosystem. The technology centre focuses on bolstering defenses against a major threat: the potential for large-scale quantum computing to compromise current communication security.
“We see quantum technologies as a strategic and operational field that will transform security, defence and the aerospace sector,” says a Gradiant representative. Gradiant’s work combines quantum information theory with advanced instrumentation, aiming to extend secure communications and enhance precision sensing for applications from navigation to Earth observation.
QKD Protocols Enhance Security for Future Space Communications
Gradiant is developing quantum key distribution protocols to address a critical vulnerability in space communications, the looming threat of large-scale quantum computing compromising existing encryption methods. This approach offers a fundamentally different security paradigm, protecting data even against adversaries with quantum computers capable of breaking current encryption standards. These QKD protocols enable the distribution of encryption keys with security rooted in quantum mechanics, a departure from classical cryptography’s reliance on computational difficulty.
Gradiant’s work extends beyond basic protocol development, encompassing the creation of components for real-world implementation, including emitters, detectors, and photonic integrated circuits. The team is also designing architectures to connect multiple users and integrate quantum security with existing telecommunications networks, anticipating a future where quantum-safe communication is essential for space-based assets. A key focus is overcoming operational limitations, such as potential denial-of-service attacks, by investigating new multi-user network paradigms for key exchange.
Extending the range and key generation rate of these quantum communications presents significant engineering challenges, which Gradiant is tackling through research into quantum repeaters and quantum memories. Quantum repeaters are designed to store and distribute quantum information over long distances, while quantum memories synchronize key generation across different network branches. These technologies are vital for building future quantum communication networks capable of spanning vast distances, essential for satellite-based applications and interplanetary communication.
Gradiant’s involvement in three European Space Agency projects, QUEENS, QUPIDO, alongside Airbus and Safran, demonstrates a commitment to translating research into practical space-based solutions, the company says. On the QUEENS project, the company is building demonstrators for distributing entanglement between space nodes, combined with precise timing capabilities.
QUPIDO focuses on developing quantum and precise-navigation inter-satellite links, furthering the potential for secure communication between satellites. These collaborative efforts highlight the growing recognition of quantum sovereignty, the need for Europe to develop its own quantum technologies to ensure independence and security in the space domain. According to Gradiant, quantum sovereignty is not only a scientific issue but also an economic, industrial, and geopolitical one, requiring investment in knowledge, talent, infrastructure, and technology.
Rydberg Sensors and NV Centers Enable Ultra-Precise Aerospace Sensing
Gradiant uses Rydberg atomic sensors and nitrogen-vacancy (NV) centers in diamond to achieve measurement sensitivities exceeding those of conventional instruments, a capability crucial for aerospace applications. These advanced sensing platforms allow for the precise detection of magnetic fields, temperature variations, and electromagnetic signals, opening avenues for improved navigation systems and detailed Earth observation. The company’s work extends beyond simple detection; it focuses on translating these quantum measurements into actionable data for autonomous systems, enhancing their operational resilience and precision.
The potential of Rydberg sensors and NV centers lies in their ability to operate in environments where traditional sensors struggle, such as those with high electromagnetic interference or requiring minimal power consumption. Gradiant’s development of these platforms addresses limitations in current aerospace technologies, specifically in areas demanding high-resolution environmental mapping and accurate positioning without reliance on external signals.
This is particularly relevant for missions requiring stealth, operation in contested environments, or precise resource management, as detailed measurements can optimize fuel consumption and extend mission lifespans, according to the company. “Protected communications, new approaches to navigation and sensing, and tools for optimising missions and resources are some of the areas in which these technologies can deliver new capabilities,” according to Gradiant, highlighting the broad impact of this sensing technology.
Gradiant’s commitment to technological sovereignty drives its participation in collaborative projects and European forums, aiming to establish independent capabilities in quantum technologies. This focus on in-house expertise is not merely a scientific pursuit, but also an economic and geopolitical strategy, ensuring Europe’s ability to develop and deploy secure, resilient space infrastructure without external dependencies.
Gradiant’s approach centers on miniaturization and integration, aiming to create compact, robust sensors suitable for incorporation into satellites, drones, and other aerospace platforms. This work is not solely focused on hardware; the company also develops sophisticated algorithms and data processing techniques to extract meaningful information from the raw sensor data, transforming quantum measurements into usable insights for mission control and autonomous decision-making. The company’s record indicates active status and continued investment in these technologies, solidifying its position as a key player in the emerging field of quantum aerospace sensing.
Source: https://gradiant.org/en/blog/aerospace-quantum-technologies-new-space/
