How it works

Ultrapure carbon nanotube growth

To create our quantum processors we grow isotopically pure carbon nanotubes, atom by atom, via chemical vapor deposition.

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Our nanotubes only contain the 12C isotope of carbon, suppressing unwanted noise from nuclear-electron spin coupling. This isotopic purity is what inspired our name, C12. After growth, we use a non-invasive method to select candidate nanotubes with the desired semi-conducting gap and zero defects to build our qubits. This results in an ideal host material for a spin qubit with minimal intrinsic decoherence.

How it works

Ultrapure carbon nanotube growth

To create our quantum processors we grow isotopically pure carbon nanotubes, atom by atom, via chemical vapor deposition.

READ MORE

Our nanotubes only contain the C12 isotope of carbon, suppressing unwanted noise from nuclear-electron spin coupling. This isotopic purity is what inspired our name, C12. After growth, we use a non-invasive method to select candidate nanotubes with the desired semi-conducting gap and zero defects to build our qubits. This results in an ideal host material for a spin qubit with minimal intrinsic decoherence.

Nano-assembly process

Using our patented nano-assembly technology, we integrate ultra-pure nanotubes onto silicon chips to form quantum circuits. During this process we ensure the nanotubes remain as clean as possible, free from any incidental contamination.

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With this technique, the devices we create are made up of carbon nanotubes connected between electrical contacts, suspended above an array of gate electrodes. This ensures the nanotubes are maximally isolated from the environment, drastically reducing decoherence due to charge and mechanical noise. Our nano-assembly technology is highly scalable, with the capacity to fabricate thousands of qubits per hour. Since the footprint of the nanotube qubits is quite small, we can embed hundreds of thousands of qubits on a single chip.

Nano-assembly process

Using our patented nano-assembly technology, we integrate ultra-pure nanotubes onto silicon chips to form quantum circuits. During this process we ensure the nanotubes remain as clean as possible, free from any incidental contamination.

READ MORE

With this technique, the devices we create are made up of carbon nanotubes connected between electrical contacts, suspended above an array of gate electrodes. This ensures the nanotubes are maximally isolated from the environment, drastically reducing decoherence due to charge and mechanical noise. Our nano-assembly technology is highly scalable, with the capacity to fabricate thousands of qubits per hour. Since the footprint of the nanotube qubits is quite small, we can embed hundreds of thousands of qubits on a single chip.

Qubit operation

Our hybrid quantum architecture combines spins to ensure long coherence times and high-frequency microwave components to enable fast operations.

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Gate electrodes allows for the trapping of a single electron in a double quantum dot hosted in a single carbon nanotube.

STEP 1 : Gate electrodes are used to form a double quantum dot within the nanotubes, where a single electron is trapped. This is the basis for our qubits.

STEP 2 : Using a magnetic gate electrode, we add a magnetic texture that entangles the electronic spin with the charge dipole in the double quantum dot. This makes a spin qubit.

STEP 3 : The spin qubit is then addressed through the resonator via microwave pulses. We can also use the control electrodes to perform gates.

Two qubit gates are performed via a virtual photon exchange with the resonator and spin-spin coupling between two qubits.

Qubit operation

Our hybrid quantum architecture combines spins to ensure long coherence times and high-frequency microwave components to enable fast operations.

READ MORE

Gate electrodes allows for the trapping of a single electron in a double quantum dot hosted in a single carbon nanotube.

STEP 1 : Gate electrodes are used to form a double quantum dot within the nanotubes, where a single electron is trapped. This is the basis for our qubits.

STEP 2 : Using a magnetic gate electrode, we add a magnetic texture that entangles the electronic spin with the charge dipole in the double quantum dot. This makes a spin qubit.

STEP 3 : The spin qubit is then addressed through the resonator via microwave pulses. We can also use the control electrodes to perform gates.

Two qubit gates are performed via a virtual photon exchange with the resonator and spin-spin coupling between two qubits.

Running quantum operations

A cryostat, electronic devices and a software interface are required to run quantum operations on our chip.

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Our quantum chips are embedded in a cryostat. The cryostat is necessary for the superconducting resonator. It also suppresses most thermal noise and makes it possible to isolate low-energy features of the qubit spectrum and target transitions at the GHz range.

To perform basic quantum operations, electronic devices send i/o signals to the quantum chip. A software interface allows the user to run the quantum processor in real time.