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Which limit reduces quantum computer operation fidelity when scaling entangled qubits?

A)Increased measurement coherence timescale
B)Enhanced single-qubit readout error
C)Decreased network bandwidth
D)Growing decoherence from environmental noise

💡 Explanation

Growing decoherence degrades fidelity because random interactions disrupt the delicate entangled states through quantum decoherence. Therefore, qubits lose their superposition before computation is completed, rather than maintaining coherence indefinitely as required.

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