After two decades of intensive experimental and theoretical research in quantum science, we have now reached a new era of quantum technologies. Several scenarios have been identified for which quantum information processing outperforms its classical analogue. Moreover, various implementations have demonstrated reliable control and operation of around ten qubits. Despite these efforts and advances, we are still very far away from a full-fledged quantum device mastering several thousand qubits.
On the road towards such a quantum device, theory and experiment need to work together closely in a joint focused effort to tackle the challenges ahead. The main challenge of BeyondC is to identify applications of and methods for quantum information systems beyond classical capabilities. This is the regime of demonstrated quantum superiority – when a quantum device outperforms any classical device for a certain problem class.
