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Which mechanism limits electron coherence in quantum dot qubits?

A)Decoherence via phonon interactions
B)Ohmic contact resistance increase
C)Increased radiative transition lifetime
D)High-κ dielectric leakage current

💡 Explanation

Electron coherence decays through decoherence via phonon interactions because these vibrations randomly alter the qubit's quantum state; therefore, coherence is lost, rather than maintaining its superposition due to environmental disturbances.

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