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Career 3115

Postdoc CMOS Readout Circuit for Spin Qubits

CMOS Readout circuit for spin qubits.

Job description

We are seeking a motivated Researcher to evaluate the feasibility and scalability of gate-dispersive and RF reflectometry readout techniques for semiconductor spin qubits using cryogenic CMOS (cryo-CMOS) electronics. The position focuses on enabling high-fidelity, scalable qubit readout architectures by combining analog/RF circuit design, cryogenic characterization, and quantum-device integration.

The researcher will perform detailed electrical characterization of the receiver with a passive voltage-gain frontend at both 300 K and 4 K using dipstick and cryogenic probe-station setups. This includes extracting gain, noise, linearity, impedance, and stability metrics under cryogenic operation. The candidate will reconcile experimental results with theoretical models and circuit-level simulations, refining analytical frameworks to accurately capture cryogenic effects and device non-idealities.

Subject to qubit availability, the researcher will perform spin-qubit readout experiments using the CMOS receiver platform, optimizing operating conditions to maximize readout fidelity while minimizing back-action and power consumption. In parallel, the role includes a thorough analytical comparison of RF reflectometry and gate-dispersive readout techniques, assessing trade-offs in signal-to-noise ratio, bandwidth, power efficiency, integration complexity, and scalability toward multi-qubit systems.

The outcome of this work will provide quantitative design guidelines for scalable cryo-CMOS-based readout architectures for spin-qubit quantum processors, bridging semiconductor circuit engineering and quantum hardware development.

Requirements

• PhD (or near completion) in Electrical Engineering, Applied Physics, or related field.
• Strong background in analog/RF IC design and low-noise measurement techniques.
• Experience with cryogenic measurements and/or quantum devices is highly desirable.
• Proficiency in circuit simulation and analytical modeling.

TU Delft

Delft University of Technology is built on strong foundations. As creators of the world-famous Dutch waterworks and pioneers in biotech, TU Delft is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society. For generations, our engineers have proven to be entrepreneurial problem-solvers, both in business and in a social context.

At TU Delft we embrace diversity as one of our core values and we actively engage to be a university where you feel at home and can flourish. We value different perspectives and qualities. We believe this makes our work more innovative, the TU Delft community more vibrant and the world more just. Together, we imagine, invent and create solutions using technology to have a positive impact on a global scale. That is why we invite you to apply. Your application will receive fair consideration.

Challenge. Change. Impact!

QuTech

is a mission-driven research institute of TU Delft. Together we are working on a radical new technology with world-changing potential. We are developing scalable prototypes of a quantum computer and a secure quantum internet.

We believe quantum technology will be a game changer in many social and economic sectors - including health, agriculture, climate, and security. To achieve our ambitious goals, we bring scientists, engineers, and industry together in an inspiring environment, with plenty of room for ambition, entrepreneurship, and innovation.

Have a look at our video and get a glimpse of QuTech.

Conditions of employment

• Duration of contract is 16 months Temporary
• A job of 38-40 hours per week.
• Salary and benefits are in accordance with the Collective Labour Agreement for Dutch
• An excellent pension scheme via the ABP.
• The possibility to compile an individual employment package every year.
• Discount with health insurers on supplemental packages.
• Flexible working week.
• Every year, 232 leave hours (at 38 hours). You can also sell or buy additional leave hours via the individual choice budget.
• Plenty of opportunities for education, training and courses.
• Partially paid parental leave
• Attention for working healthy and energetically with the vitality program.

Will you need to relocate to the Netherlands for this job? TU Delft is committed to make your move as smooth as possible! The HR unit, Coming to Delft Service , offers information on their website to help you prepare your relocation. In addition, Coming to Delft Service organises events to help you settle in the Netherlands, and expand your (social) network in Delft. A Dual Career Programme is available, to support your accompanying partner with their job search in the Netherlands.

Additional information

For more information about this vacancy, please contact ( ).