Fault-tolerant quantum input/output

Understand

Usual scenarios of fault-tolerant computation are concerned with the fault-tolerant realization of quantum algorithms that compute classical functions, such as Shor's algorithm for factoring.

• In particular, this means that input and output to the quantum algorithm are classical.
• In contrast to stand-alone single-core quantum computers, in many distributed scenarios, quantum information might have to be passed on from one quantum information processing system to another one, possibly via noisy quantum communication channels with noise levels above fault-tolerant thresholds.
• In such situations, quantum information processing devices will have quantum inputs, quantum outputs or even both, which pass qubits among each other.