Quantum Engineering Postdoctoral Fellow

Berkeley Lab's Applied Mathematics Computational Research Division (AMCR) has an immediate opening in the Quantum Information Science and Technology Group (QuIST) for a Quantum Engineering Postdoctoral Fellow under the programs of Advanced Quantum Testbed (AQT) and Quantum System Accelerator (QSA). The primary goal of this position is to focus on materials and circuit electric field engineering to understand the material-performance causality of superconducting qubits, including the optimization of electromagnetic design and development of new metrology and fabrication techniques.

The candidate will have access to the state‑of‑the‑art superconducting circuit fabrication facility, quantum measurement lab, and advanced material characterization tools at Lawrence Berkeley National Laboratory, and will work with all teams at Berkeley Lab to build a full‑stack superconducting quantum processor unit (QPU) for scientific research.

• Perform electromagnetic simulation of qubit circuits with novel designs to achieve high‑coherence qubits.
• Develop cleanroom metrology for superconducting qubit devices, especially CMOS in‑line metrology, in the lab and in collaboration with industrial partners.
• Develop and optimize fabrication processes to improve device materials and characterize the performance of superconducting qubit devices.
• Fabricate multiqubit, multilayer quantum processor developed at Berkeley Lab.
• Present and publish experimental results in internal and external meetings and journals.
• Support and lead collaboration projects with quantum computing industrial partners.

• Mentoring graduate students.
• Support or lead writing, including program reports, grants, and papers.

• Ph.D. degree in Physics, Applied Physics, Electrical Engineering, Materials Science, or a related field.
• Experience in cleanroom/nanofabrication processes, with emphasis on hands‑on experience and knowledge of cleanroom metrology for device performance/yield characterization.
• Experience in one or more of the following research areas:
  • Solid‑state quantum computing platform, including but not limited to superconducting qubits, spin qubit, semiconductor nanowire/topological qubits, rare‑earth qubit, nanophotonics.
  • Microwave circuit design and simulation (e.g., EM solvers, network analysis).
  • Complex structure device fabrication, including CMOS multilayer devices, flip‑chip devices, microwave air bridges, and/or RF circuit devices.
• Relevant publication record and demonstration of proficient written and verbal presentation of scientific results.
• Ability to work effectively in a collaborative environment.
• Ability to mentor and direct the work of students.
• Willingness to travel occasionally to collaborators' sites and conferences.

• Experience in superconducting qubits design, fabrication, and measurement, especially in surface participation simulation and material loss tangent.
• Familiarity with material–device causality, i.e., connecting film microstructure, surface chemistry to device physics and performance.
• Experience with surface treatment and surface metrology/measurement.