Among the three pillars of quantum technologies computing, communication and sensing, the NQFF currently focuses on the first pillar. The following gives a basic introduction to a full-stack quantum computer to understand the component requirements.
Introduction to Full-Stack Quantum Computer
Currently, there are many choices to realise a unit of quantum information called quantum bit or qubit. These platforms can be broadly classified as material-based qubits and isolated particle-based qubits. Some examples of material-based qubits are superconducting circuits, silicon-donor, quantum dots etc., all requiring sophisticated micro and nano fabrication to build the qubits. On the contrary, isolated particle-based qubits like atoms, molecules, or photons generally require a specialised ultra-high vacuum and or laser to make the qubits.
The foundry supports both types of full-stack machines by manufacturing components that require micro/nano fabrications. In the following, we show which components we develop and where in the full stack they are used. We start with a generic full-stack block diagram: