Infleqtion Introduces Quantum Spectrum for Atom-Based RF Sensing

Infleqtion has formally established Quantum Spectrum, a new category of quantum sensing that utilizes neutral-atom technology for radio frequency (RF) detection. Unlike conventional RF receivers that rely on antenna-based front ends, Quantum Spectrum systems use Rydberg atoms as the sensing medium. This architecture allows a single aperture to tune continuously across a massive range from hertz to terahertz, providing broader spectrum awareness and resilience against jamming, spoofing, and electronic warfare. The platform is intended to address spectrum congestion and GPS-denied environments where traditional receivers often fail due to physical and signal interference.

The company is currently executing on active defense contracts in the United States, the United Kingdom, and Australia to transition this technology from laboratory prototypes to field-deployable hardware. In the U.S., Infleqtion is collaborating with the Army Research Laboratory (ARL) on the RIQER project to field a transportable quantum RF demonstration system for positioning, navigation, and timing (PNT). In the U.K., the QuDiFi program is developing multi-sensor direction-finding capabilities, while in Australia, the QOBRA project utilizes machine learning to optimize Rydberg atom-based receivers for maximum sensitivity and instantaneous bandwidth.

Infleqtion’s expansion into the RF market aligns with its broader quantum sensing portfolio, which includes quantum clocks, gravity gradiometers, and inertial sensors. The company has engaged prime integrators including Dell Federal, L3Harris, and SAIC to scale these systems for operational use. With the quantum sensing market projected to reach $31 billion by 2040, Infleqtion is positioning its atom-based receivers as a critical upgrade for national security infrastructure and near-term commercial applications in aviation, telecommunications, and autonomous systems.

You can find the official announcement regarding Quantum Spectrum here. For more information on Infleqtion’s neutral-atom platform and its recent logical qubit demonstrations with NVIDIA, visit the technology portal here.

May 13, 2026