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Which outcome reduces fidelity in quantum computing qubits?

A)Environmental decoherence entangled pair separation
B)Increased phase shift tolerance
C)Improved qubit thermal insulation
D)Enhanced gate voltage stability

💡 Explanation

Environmental decoherence causes entangled qubits to lose their quantum properties due to interactions with the environment because entanglement requires isolation. Therefore, fidelity is reduced rather than improved, where insulation helps to lengthen the duration.

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