Raymond N. Schouten

This versatile project provides flexible and dynamic signal distortion as a sound effect for synthesizers and guitars. A chain of saturating amplifiers with switchable summation allows for many kinds of overdrive curves. A low-frequency modulator creates dynamically changing distortion. With a fully optimized design, the PCB works as an operative panel with knobs and switches, having other components at the back.

Abstract The prospect of building quantum circuits1,2 using advanced semiconductor manufacturing makes quantum dots an attractive platform for quantum information processing3,4. Extensive studies of various materials have led to demonstrations of two-qubit logic in gallium arsenide5, silicon6,7,8,9,10,11,12 and germanium13. However, interconnecting larger numbers of qubits in semiconductor devices has remained a challenge.

In this Letter, the received date should be 20 December 2017, instead of 27 April 2018. This has been corrected online.