Quantum error correction has long been the Achilles' heel of practical quantum computing. The inherent fragility of quantum states means that even the smallest environmental disturbance can collapse a computation. However, recent breakthroughs in error correction are finally bringing fault-tolerant quantum computing within reach.
The Error Correction Challenge
Unlike classical bits, which can be copied and checked for errors, quantum bits cannot be directly measured without destroying their quantum state. This fundamental limitation has required entirely new approaches to error detection and correction.
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