Entangled-Photon Source Research Engineer

Entangled-Photon Source Research Engineer

Quandela

Massy, France

About this position:

The team develops experimental platforms enabling spin-photon and spin-spin entanglement. Within this framework, your role will focus on stabilizing and improving spin-photon cluster state generation while implementing fast optical control schemes operating at nanosecond time scales.

Working at the interface between theory and experiment, you will translate cluster-state protocols into robust and reproducible laboratory implementations, contributing directly to demonstrator milestones and helping move these concepts toward scalable hardware.

What will you do?

Develop and operate spin-control experiments:

• Build and operate custom optical setups to address and characterize charged quantum dots at cryogenic temperatures.
• Implement and refine picosecond pulse shaping and pulse sequences.
• Manipulate spin states using all-optical approaches and applied fields.
• Implement real-time switching of pulse sequences at nanosecond time scales (6–24 ns).
• Ensure proper synchronization between optical pulses and fast electronic control systems.

Characterize and optimize system performance:

• Characterize spin-photon emission properties and coherence metrics.
• Optimize pulse sequences and experimental parameters to improve state fidelity.
• Identify experimental limitations and propose practical improvements.

Contribute to the research roadmap:

• Systematically document experimental results and report findings.
• Collaborate with internal teams when transferring validated results toward integration.

What we’re looking for?

We are seeking an experimental physicist with experience in spin manipulation in solid-state quantum systems.

A PhD, or early postdoctoral experience, in Quantum Optics, Condensed Matter Physics, or a closely related field would be particularly valued. Experience with platforms such as charged quantum dots, NV centers, silicon carbide spins, or comparable optically addressable systems will help you integrate quickly into our environment.

If you have already controlled spins using optical pulse sequences and are familiar with the practical challenges of manipulating spin states in the lab, we encourage you to clearly highlight this experience in your application.

Must-have:

• Strong experimental spin background (PhD level).
• Hands-on optical spin control in cryogenic environments.
• Familiarity with nanosecond timing and synchronization constraints.
• Python for experiment control and data analysis.
• High autonomy and experimental rigor.

Important (can grow here):

• Experience with quantum dots or trion-based systems.
• Familiarity with coherence-enhancement techniques.
• Exposure to entanglement or cluster-state protocols.
• Experience combining optical control with fast electronics.

Bonus:

• Early postdoctoral experience in spin-based systems.
• Publications in spin-based quantum optics.
• Experience in collaborative or industrial R&D.