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Quantum Errors and Corrections — Day 20
Quantum computing harnesses the principles of quantum mechanics, such as superposition and entanglement, to perform computations that are infeasible for classical computers. However, quantum information is extremely fragile due to the phenomenon known as state collapse. Any measurement, or even inadvertent interaction with the environment, can destroy the delicate superposition of quantum states, leading the system to decohere and revert to a classical, predictable state. This process, often caused by unintended environmental measurement or noise, introduces quantum errors that can disrupt or invalidate computations.
Types and Sources of Quantum Errors
Quantum errors can arise from several sources:
Decoherence: Environmental noise disrupts the system, erasing quantum information.
Gate Errors: Imperfect control over quantum operations.
Measurement Errors: Unintended or inaccurate measurements that project the state out of superposition.
Unlike classical errors, which typically involve discrete bit flips (0 ↔ 1), quantum errors also include phase errors, amplitude damping, and more complex continuous errors.
