Applied Physicist - Quantum RF Sensing (QRF)

Infleqtion is a global quantum technology company solving some of the world’s most challenging problems. We build and integrate quantum computers, sensors, and networks. From fundamental physics to leading-edge commercial products, Infleqtion enables “quantum everywhere” through an ecosystem of devices and platforms. 

Quantum Spectrum, also known as QRF, develops fieldable radio-frequency sensing systems based on Rydberg atoms. The team combines atomic physics, lasers and photonics, RF electronics, embedded controls, software, and precision hardware to turn laboratory prototypes into repeatable, integrated sensing systems. 

Position Summary 

Infleqtion is seeking an Applied Physicist to build, operate, and improve experimental platforms for Rydberg-atom radio-frequency sensing. Reporting to the Director of R&D, Quantum RF, this physicist will independently own defined experiments and testbeds under senior technical direction, translate atomic, optical, and RF behavior into measurable sensor improvements, and carry validated improvements into integrated QRF systems. The role is centered on hands-on laboratory work; modeling supports experiment design and interpretation rather than serving as the principal output. 

Job Responsibilities 

The duties and responsibilities below describe the essential functions of the role. Depending on business needs, the position may perform some or all these duties. Duties, responsibil