Quantum X Labs is combining its patent-pending quantum atomic clock technology with Rydberg atom-based radio-frequency sensing, a pairing of distinct atom-based sensing capabilities intended for defense and aerospace applications. The company is developing this integration in its laboratories, aiming to unify high-precision timing with quantum-enabled RF sensing using highly sensitive, excited Rydberg atoms.
“We see significant technological value in bringing different atom-based sensing capabilities together rather than developing each technology entirely in isolation,” said Prof. Nir Sharon, Chief Quantum Scientist of Quantum X Labs. This development aligns with growing interest from both DARPA and the aerospace sector, including a recent feasibility study by Airbus Defence and Space, in transitioning atom-based quantum sensing toward real-world applications.
Rydberg RF Sensing Complements Quantum Atomic Clock Technology
Quantum X Labs is actively developing Rydberg atom-based radio-frequency sensing, a technology that exploits the heightened sensitivity of excited atoms to electromagnetic fields to detect and characterize signals across a broad spectrum. This work extends beyond the company’s existing Ramsey Coherent Population Trapping platform, previously demonstrated as a high-sensitivity atomic clock, and aims to unify precision timing with environmental RF awareness. The approach uses atoms energized into highly energetic states where a single external electron makes them acutely responsive to even weak electromagnetic influences, offering a novel method for RF detection.
Changes in these atomic states, optically interrogated, provide a means of discerning incoming RF signals, differing from conventional electronic sensing methods. The integration program centers on creating a unified technological platform, combining the precision of atomic timing with the information gleaned from RF sensing, and builds on Quantum X Labs’ pending patent application for its atomic clock.
Rydberg Technologies, a specialist in quantum measurement and imaging using Rydberg atoms, builds atomic radio frequency measurement and imaging hardware based on Rydberg atoms, developing the Rydberg Field Measurement System, an atomic RF field probe linked to a mainframe control unit, and compact atomic references for laser stabilization. This expertise positions them as key innovators in the field, with contracts with DARPA including a Small Business Innovation Research Phase II contract and a direct contract focused on Rydberg atom RF sensing. The DARPA collaboration emphasises the strategic interest in this technology for applications requiring robust and precise electromagnetic awareness, and is particularly relevant to defense and aerospace sectors facing increasingly complex electromagnetic environments.
A 2026 study conducted by Airbus Defence and Space, Quantum Valley Ideas Laboratories, and the German Aerospace Center examined the feasibility of Rydberg atom-based sensors in spaceborne radar systems, highlighting a growing trend toward transitioning this technology research to practical applications. We are now developing Rydberg atom RF sensing technology in our laboratories and working toward integrating these capabilities.
Our objective is to create an architecture in which atomic technology can provide both precise timing and information about the surrounding RF environment.” The company intends to continue laboratory work, testing and integration efforts to demonstrate the combined architecture, though a fully integrated system has not yet been demonstrated.
This approach addresses a critical need for maintaining timing capabilities in environments where GPS access may be limited or unavailable, a concern for both defense and aerospace applications. The company’s work reflects a broader industry shift toward atom-based quantum sensing and precision timing technologies for operations in contested electromagnetic environments, and the integration of these capabilities could provide a significant advantage in future systems.
We see significant technological value in bringing different atom-based sensing capabilities together rather than developing each technology entirely in isolation.
Prof. Nir Sharon, Chief Quantum Scientist of Quantum X Labs
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