In a paper to appear in PRX, Naomi and Simon present detailed calculations simulating a quantum computer built from many small units — each unit being similar in complexity to the devices that can already be created in the lab. They find than an architecture involving connecting up many small units can be both robust and fast (a process called entanglement purification can quickly remove any ‘noise’ due to dodgy links).
The preprint paper is ‘Freely Scalable Quantum Technologies using Cells of 5-to-50 Qubits with Very Lossy and Noisy Photonic Links‘ – a long title but descriptive 🙂
