= Quantum error correction
{wiki=Quantum_error_correction}
Quantum error correction (QEC) is a crucial aspect of quantum computing that aims to protect quantum information from errors due to decoherence, noise, and operational imperfections. Quantum bits, or qubits, are the fundamental units of quantum information. Unlike classical bits, which can be either 0 or 1, qubits can exist in superpositions of both states. This property makes quantum systems particularly susceptible to errors, as even small interactions with the environment can lead to significant loss of information.
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