QRF Physicist

Infleqtion • Louisville, CO

40d • Onsite

About The Position

Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. POSITION SUMMARY Infleqtion's Quantum RF (QRF) group is seeking a Physicist to support the development and experimental validation of Rydberg-atom-based RF sensing systems. The successful candidate will work in a hands-on lab environment building and testing integrated optical, electronic, and RF systems that push the limits of quantum sensing performance. This role is ideal for an early-career physicist with experience in experimental AMO physics and a working understanding of RF systems who thrives in a highly interdisciplinary setting.

Responsibilities

• Support experimental work involving Rydberg atom-based RF sensors and subsystems.
• Assist in the design, assembly, and alignment of laser, optical, and RF systems.
• Operate and troubleshoot laboratory instrumentation, including photodiodes, spectrum analyzers, signal generators, and oscilloscopes.
• Contribute to integration of optical, electronic, and RF components into compact, ruggedized systems.
• Perform measurement campaigns to characterize sensitivity, noise, and dynamic range of prototype devices.
• Support modeling and data analysis for atomic and electromagnetic phenomena using Python, Ansys, or similar tools.
• Work closely with physicists and RF engineers to iterate design improvements and document experimental findings.
• Participate in internal reviews and external reporting (technical memos, figures, and presentations).
• Maintain accurate lab documentation and ensure proper handling of technical data subject to ITAR/EAR regulations.

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Industry: Publishing Industries
• Education Level: No Education Listed
• Number of Employees: 101-250 employees