Noise is the notorious adversary of quantum computing. Qubits are sensitive to the slightest environmental perturbations, quickly causing errors to accumulate…
Noise is the notorious adversary of quantum computing. Qubits are sensitive to the slightest environmental perturbations, quickly causing errors to accumulate and make the results of even the simplest quantum algorithms too noisy to be meaningful. Quantum error correction (QEC) circumvents this problem by using many noisy physical qubits to encode logical qubits effectively immune to noise.