Superconducting circuits are among the leading technologies in the development of quantum processors. The members of COLD collaborate with international partners developing superconducting qubits, such as the Rigetti company (within the SQMS center) and the European group led by Ioan Pop at KIT (Germany). Together with our partners, we will develop a new class of radio-pure qubits.

In the last years, we discovered that radioactivity (cosmic rays, but also the natural radioactivity of the laboratory environment) will limit the performance of superconducting qubits. Exploiting the unique facilities of COLD, we will deploy an ultra-low radioactivity environment for qubits operation.   

Moreover, the COLD team will exploit its expertise in thin films to mitigate the effect of residual radioactive interactions. Thin film deposited around the qubit, indeed, will "absorb" the particles travelling in the chip before they can actually reach the active part of the device.