Cryogenic electronics for silicon quantum bits

Currently, the research on quantum computing attracts great attention in order to favor upscaling of the number of qubits for superior calculation capacity. The mature CMOS technology for transistor circuits offers the opportunity to develop on-chip integration of CMOS qubits with classical electronics at low temperatures thereby improving qubit manipulation and read out with respect to room-temperature apparatus. Elementary electrical circuits made with industrial 28nm fully depleted Silicon on Insulator technology are ready for use at low temperatures. The internship concentrates on experimental investigations of specific electronic circuits (ring oscillators, multiplexers, ADCs, amplifiers) down to 10 mK in order to address the performance at low temperatures and the physical understanding with respect to available bandwidth, local heating, electrical noise, and back-gating.

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