Qubit-size low-power cryogenic CMOS ICs for monolithic quantum processors

This manuscript addresses the severe design challenge for the implementation of microwave and mm-wave control-and-readout ICs enabling the implementation of monolithic Silicon quantum processors (QPs).

For the first time, we describe the circuit design challenge within a unitary frame and provide some general considerations about requirements, technology and performances, as a reference for future developments. In support of the discussion and considerations, we report also some results emerged from our work envisioned and carried out within our research and developments toward monolithic QPs. In particular, we address the key aspects leading to the new design paradigm enabling qubit-size low-power CMOS ICs for qubit control and readout for monolithic QPs and summarize the main characteristics and results exhibited by some representative key building blocks. These circuit solutions open to a new class of low-power mm-wave circuits made of a few MOSFETs, without spiral inductors or other large and lossy distributed passive components, resulting in a characteristic size close to our qubit devices, namely — qubit-size low-power cryogenic ICs, as key enabling solutions for monolithic QPs scalable to a large number of qubits.