Decoherence

How Quantum Error Correction Works: Redundancy, Syndromes, and the 3-Qubit Bit-Flip Code

Quantum error correction protects fragile quantum information by encoding a logical qubit across multiple physical qubits, allowing errors to be detected and corrected without collapsing the quantum state. The 3-qubit bit-flip code serves as a fundamental example, demonstrating how redundancy and syndrome measurements enable error recovery, a crucial step towards fault-tolerant quantum computing.