We are seeking a Quantum Physicist – System Modeling & Operation Optimization in our Broomfield, CO location to improve the operation and performance of next-generation QCCD trapped-ion quantum computers. Embedded within the system integration team, this physicist will combine a strong theoretical foundation in atomic physics and quantum computing with a practical understanding of experimental hardware. They will work daily with engineers, scientists, and system operators to interpret experimental data, develop and validate physical models, and translate their analysis into improvements in quantum operations. The ideal candidate is comfortable working with theoretical models, numerical simulation, and experimental analysis in the context quantum computer operations. They will use that knowledge to optimize device operations, diagnose performance limitations, and guide hardware and control decisions. Success in this role means turning physical insight into measurable improvements in fidelity, reliability, and throughput.

All applicants for placement in safety-sensitive positions will be required to submit to a pre-employment drug test.

Key Responsibilities:

• Develop and validate theoretical and numerical models of trapped-ion quantum operations, including laser–ion interactions, motional dynamics, and sources of error and decoherence.
• Analyze experimental data to identify performance limitations, test physical explanations, and recommend improvements to operating parameters, device control sequences, and calibration routines.
• Collaborate with system operators and engineers to design targeted experiments, interpret results, and implement and verify improvements on the hardware.
• Develop and maintain operation error models grounded in measured system behavior, identifying the dominant contributions and prioritizing opportunities for improvement.
• Perform analyses and design trade studies to inform hardware specifications, control approaches, and concepts of operation for future quantum computers.
• Build reusable modeling, analysis, and automation software, and communicate findings through actionable recommendations, technical documentation, presentations, and publications.

YOU MUST HAVE:

• PhD in physics or a closely related field, completed prior to the start date.
• Minimum of 8 years of experience, including PhD research, in atomic physics, quantum computing, quantum information, or closely related fields.
• Due to Contractual requirements, must be a U.S. Person defined as a U.S. citizen, permanent resident or green card holder, or worker granted asylum or refugee status.
• Due to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen.

WE VALUE:

• Strong foundation in the theory of atomic systems and coherent quantum control, with experience applying that knowledge to experimentally realized qubit systems.
• Deep understanding of trapped-ion quantum computing, particularly QCCD architectures and laser cooling.
• Strong scientific programming skills and experience developing software for modeling and data analysis.
• Experience collaborating closely with experimental scientists or engineers to translate theoretical analysis into practical changes in hardware operation.
• Experience modeling and mitigating experimental effects such as laser noise, drift, crosstalk, motional heating, and calibration errors.
• Experience benchmarking qubit operations and connecting measured performance to physical error mechanisms.
• Familiarity with experimental control systems, automated calibration, and the practical constraints of operating complex quantum hardware.
• Ability to work independently on open-ended problems and prioritize analysis based on its potential impact on system performance.
• Excellent communication skills, including the ability to explain physical mechanisms and recommendations to multidisciplinary teams, with published results in their field.

This position is Bonus and Equity Eligible

The base pay range for this role is $148,000 - $199,000 annually.  Actual compensation within this range may vary based on the candidate's skills, educational background, professional experience, and unique qualifications for the role.

Quantinuum is a leading quantum computing company delivering a full stack platform designed to make quantum computing deployable in real-world environments. With active engagements spanning pharmaceuticals, material science, financial services, government, industrial sectors, and leading academic and research institutions worldwide, we are helping organizations unlock the transformative potential of quantum computing. 

Our global team of more than 800 employees includes many of the world's leading scientists, engineers, and researchers, with more than 70% of our technology team holding advanced degrees at the Master's or PhD level. Headquartered in Broomfield, Colorado, Quantinuum operates across the United States, United Kingdom, Germany, Japan, and Singapore. 

By joining Quantinuum, you’ll help shape the future of quantum computing, pushing the limits of technology, and making the impossible possible.

What’s in it for you?

We believe our people are our greatest strength and offer a comprehensive rewards package that supports your professional growth, well-being, and long-term success.

• Competitive compensation and the opportunity to work on groundbreaking technology
• Flexible work arrangements that support work-life balance
• Employer-subsidized medical, dental, and vision insurance
• 401(k) retirement savings plan with company match and student loan repayment benefit
• Equity opportunities
• Generous paid time off, sick leave, and 12 paid holidays annually
• Paid parental leave
• Employee discount programs 

Equal Opportunity Employer

Quantinuum is proud to be an equal opportunity employer. We are committed to building an inclusive workplace where all employees and applicants are treated with respect and provided equal opportunities regardless of race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, veteran status, ancestry, marital status, or any other characteristic protected by applicable law.

Know Your Rights: Workplace discrimination is illegal. For more information about Quantinuum, please visit our website. 

We are committed to making our recruitment process accessible to all. If you require any reasonable adjustments at any stage of the application or interview process, please let us know use the Lets talk contact form. 

Applications will be accepted on an ongoing basis, there is no application deadline for this position.