Step into
C12’s
quantum lab

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At C12, the future of computing is built by hand, one atom at a time. Behind every breakthrough lies a space designed for absolute precision - our lab in the heart of Paris
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Our LOCATION

Paris, from the
ground Up

Our lab spans two sites in the heart of the Latin Quarter, from the bustling streets around the Panthéon to a specially designed underground facility, shielded from noise, light, and vibration.

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19 rue Valette,
75005 Paris
26 rue des Fossés Saint-Jacques,
75005 Paris
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A tour through the process

STEP 1
Theory
It all begins with physics. Our Theory team lays the foundation, modeling the physics of our technology and exploring how noise, control, and architecture interact. Their insights shape everything that follows: from the layout of the qubit to the protocols it will run. It’s where the ideas form, and the quantum journey begins.
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STEP 2
Nanofabrication
Every chip begins in our cleanroom, a high-tech in-house facility equipped with advanced tools similar to those found in leading semiconductor foundries. Here, our Nanofabrication team designs and produces the nanostructures that form the foundation of our quantum processors. Working at nanometric precision, they transform raw materials into the building blocks of a quantum computer.
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STEP 3
Carbon nanotube growth
Our CNT team grows carbon nanotubes atom by atom inside a high-temperature furnace. Using the carbon-12 isotope eliminates sources of noise. In just minutes, hundreds of nanotubes are born, each up to 100 thousand times thinner than a human hair. Only the purest make it into our qubit processors.
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STEP 4
Characterization
Then our Characterization team takes over. Using lasers, microscopes, and cryogenic testbeds, they test the mechanical, optical, and electrical quality of each nanotube. Only a handful meet our standards. It's a careful dance of data and intuition.
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STEP 5
Nano-assembly
With precision that borders on poetry, our Nano-assembly team positions each approved nanotube onto the chip using a robotic arm, custom tools, and our patented nano-assembly technique. What began as a delicate, handcrafted process is now guided by increasing automation and control, ensuring both accuracy and repeatability. This is where craftsmanship evolves into scalable engineering.
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STEP 6
Software enablement
Quantum hardware doesn’t run itself. Software team builds the tools that bring it to life: orchestrating hardware, automating experiments, and enabling real-time control from lab to cryostat. They code in close collaboration with physicists, translating ideas into testable protocols.
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STEP 7
Qubit control
This is where quantum magic begins. Our Qubit Control team brings the chip into the cryostat, the coldest place in the universe, hovering just above absolute zero. Here, the qubits reveal their true nature. Through precision testing, they observe coherence, entanglement, and performance. It’s the moment where each chip's unique quantum behavior is unveiled—the culmination of our fabrication journey.
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Inside our
team

We’re more than a lab. We’re a collective of artisans, engineers, and explorers. Some joined for science. Some for the mission. All for the chance to craft something unique.
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If you’re intrigued by our
breakthroughs, inspired by our mission,
or interested in collaborating, let’s talk.
CONTACT US
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26 rue des Fossés Saint-Jacques, 
75005 Paris
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