Quantum Physicist

Quantum Physicist

Superlinear Computing · Palo Alto, CA (with Chicago lab) · Full-time

About Superlinear Computing

Superlinear Computing is a quantum research and infrastructure company headquartered in Palo Alto, with a quantum lab at the Illinois Quantum and Microelectronics Park in Chicago. We design, deploy, and operate on-premises superconducting QPU systems, apply machine learning to characterize quantum system behavior, and translate those findings into specialized hardware products.

We work at the frontier of quantum hardware and real-world applications, giving researchers, enterprises, and government partners access to quantum capabilities that were previously out of reach. We believe the transition to quantum computing will be defined not just by the machines themselves, but by the infrastructure built around them.

The Role

You own the physical understanding across every system we operate or build — superconducting QPUs today, optical and semiconductor entropy sources as the roadmap develops, and whatever comes next. You set the direction. You define what we build, what we measure, and what good looks like.

You work alongside engineering and executive leadership to translate physical intuition into product direction. You direct our bench scientists and engineers on what to measure and how to interpret it. You represent Superlinear Computing's physics work to customers, partners, government collaborators, and investors.

This is a leadership seat with real ownership. The scope grows with the company.

What You'll Own

• The physics roadmap across all current and emerging system types: superconducting QPUs, optical entropy sources, semiconductor entropy sources
• Figures of merit and characterization targets that our ML-driven analysis pipelines optimize against
• Direction-setting for bench scientists and engineers in Palo Alto and Chicago on calibration, characterization, and benchmarking priorities
• Investigation at the physics level into coherence dynamics, noise sources, and gate error mechanisms — and translation of those findings into hardware decisions
• Architecture conversations with engineering leadership on system integration and what to build next
• External representation of Superlinear Computing's physics: customer conversations, partner integrations, conferences, and technical hires

What We're Looking For

• PhD in experimental physics, quantum engineering, or a closely related field
• Deep grounding in superconducting qubit physics: coherence, gate fidelities, readout, error mechanisms
• Working knowledge of microwave measurement and control: IQ mixing, heterodyne readout, pulse shaping
• Track record of setting technical direction at scale — as a lab PI, group lead, technical founder, or senior industry physicist
• Breadth across modalities: comfort moving between superconducting, optical, and semiconductor systems, or a clear track record of cross-modality work

Nice to Have

• Hands-on dilution refrigerator experience at the operator level
• Familiarity with gate-level SDKs (pyQuil, Qiskit, Cirq) and automated calibration frameworks (QuantrolOx, QUAlibrate, Q-CTRL)
• Depth in TLS physics, flux noise, readout optimization, or crosstalk characterization
• Experience designing or validating optical or semiconductor entropy sources
• Prior startup or industry leadership experience
• Publication record or patent portfolio at the field-shaping level

How We Hire

This is a senior leadership role with a bespoke compensation package: competitive salary, meaningful equity, and a seat at the table to back it up. We move quickly on the right person.