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Quantum Physicist – Infleqtion

Job in Boulder, Boulder County, Colorado, 80301, USA
Listing for: Elevatequantum
Full Time position
Listed on 2025-12-02
Job specializations:
  • Engineering
    Electrical Engineering, Systems Engineer
Salary/Wage Range or Industry Benchmark: 115000 - 165000 USD Yearly USD 115000.00 165000.00 YEAR
Job Description & How to Apply Below

Company:
Infleqtion

Location:

Boulder, CO
Position Type:
Full-Time
Pay: $115-$165,000
To Apply

Description

Infleqtion
is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation. We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward. We encourage applications from experimental physicists with expertise in
Atomic, Molecular, and Optical (AMO) physics
, particularly those with experience in the coherent control of quantum systems such as ultracold atoms, trapped ions, and diamond NV centers.

Job Responsibilities
  • Design, build, calibrate and maintain Quantum Computers based on neutral atoms.
  • Participate and/or lead Research and Development projects for laser systems, Quantum Processing Units, quantum gate protocols, etc. for Quantum Computers.
  • Create, test, and validate mathematical models of atomic physics behavior, and use the results to inform system design by translating high-level system requirements into specialized engineering subsystems.
  • Self-start and successfully execute on a new R&D activity given a well-defined goal and constraints (e.g. resources, timeframe): gather requirements from stakeholders, drive definition of solution space, drive project execution.
  • Develop, test, run, and debug software for conducting experiments and system tuning in production.
  • Design, assemble, and test laser and optical systems.
  • Ownership of subsystems to maintain high availability and high performance.
  • Mentor and teach junior team members as indirect reports. Supervise interns.
Requirements
  • PhD in atomic physics, optical physics, or related field; or equivalent related professional experience (4+ years);
    If you have substantially more experience than this and are excited to apply, please do! We will also consider hiring at the
    Senior Quantum Physicist
    level.
  • Proficiency in using tools commonly found in an atomic physics lab, such as lasers, acousto-optic modules, RF signal generators and analyzers, and ultra-high-vacuum systems.
  • Proficiency in writing Python code for running physics experiments.
  • Proficiency in calculating atom-light interaction for input laser specifications.
  • Excellent verbal and written communication skills, ability to effectively share information with technical and non-technical staff at all levels of company hierarchy.
  • Excellent collaboration skills, ability to work in an agile efficient team environment where engagement, feedback, and participation are an expected part of successful job performance.
  • Demonstrated problem solving skills and fast learning rate.
  • Ability to work both autonomously—taking high-level goals as input to develop and execute an optimal plan while gathering necessary resources—and collaboratively, by soliciting and incorporating input from colleagues.
It is a plus if you have:
  • Experience in operating high power CW laser (> 1 Watt) and/or short-wavelength visible laser (< 500 nm) and designing their laser power delivery systems
  • Experience with characterization and mitigation of laser frequency and intensity noise
  • Experience with analog electronics and use of servo loops for laser and subsystem stabilization
  • Experience with image projection through a high numerical aperture (NA) imaging system
  • Experience in integrating heterogeneous subsystems for a complex physics experiment
  • Familiarity with Git, Linux, and command line interface (CLI) tools
  • Enthusiasm for staying up-to-date with latest developments in AMO physics and reviewing relevant papers for the team
Note:

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

Working Conditions &

Physical Requirements:

Work will normally be performed in an office…

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