Which effect changes as the wave function's phase coherence degrades within a quantum computer's superconducting qubit?

💡 Explanation

When phase coherence degrades, quantum entanglement fidelity weakens because decoherence introduces errors that disrupt the precise phase relationships required for qubits to remain entangled, leading the fidelity decrease exponentially. Therefore entanglement fidelity losses result, rather than distribution broadening, measurement uncertainty, or tunneling increases which don't affect qubit coherence.

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