What is quantum error correction?

Quantum error correction is a field within quantum computing that focuses on protecting quantum information from errors caused by decoherence, noise, and other quantum phenomena. Unlike classical error correction, quantum error correction must deal with the unique challenges of quantum mechanics, such as superposition and entanglement. It uses specialized codes and algorithms to detect and correct errors without directly measuring the quantum state, thereby preserving the integrity of quantum data. This is essential for building reliable and scalable quantum computers.