Quantum Compilation Intern M/F à Paris, France

Alice & Bob is developing the first universal, fault-tolerant quantum computer to solve the world’s hardest problems.

The quantum computer we envision building is based on a new kind of superconducting qubit: the Schrödinger cat qubit ‍⬛ . In comparison to other superconducting platforms, cat qubits have the astonishing ability to implement quantum error correction autonomously!

We're a diverse team of 250+ brilliant minds from over 35 countries united by a single goal: to revolutionise computing with a practical fault-tolerant quantum machine. Are you ready to take on unprecedented challenges and contribute to revolutionising technology? Join us, and let's shape the future of quantum computing together!

Purpose of the role

In a context where magic state preparation dominates the space-time cost of fault-tolerant quantum algorithms, recent advances have substantially widened the factory design space: batched protocols producing several magic states per run, compact protocols leveraging qubit recycling, and “unfolded” distillation performed at the physical rather than the logical level, which exploits the
noise bias of cat qubits.

Because the repetition codes underlying Alice & Bob’s architecture do not natively give access to the full Clifford group, the architecture must also distill Clifford resource states in addition to non-Clifford magic states. Selecting the best factory is a highly multi-parameter optimization problem, coupling spatial and temporal code distances, single- versus multi-output protocols, the degree of parallelism of the distillation circuit, the magic state injection scheme, the factory layout, and hardware connectivity constraints.

The Quantum Compilation Intern helps navigate this design space to identify the most resource-efficient factories for Alice & Bob’s
architecture, focusing first on magic state factories and possibly extending the resulting tools to Clifford state factories.
Reporting to the Quantum Compilation PhD Researcher (CIFRE), with possible co-supervision by Élie Gouzien, they will work closely with the Compilation and QEC teams to design, compile and optimise distillation factories for Alice & Bob’s architecture, and may design new distillation protocols along the way. This work feeds directly into Alice & Bob’s physical resource estimates for (early) fault-tolerant quantum computation.

The internship starts between January and March 2027 !