Which inaccuracy affects entangled photon QKD despite perfect correlation?

💡 Explanation

Detector inefficiencies affect all qubits and can be calibrated; polarization basis relative alignments introduce errors because the photons are entangled, so even perfect correlation can produce decryption errors with the Polarization basis alignment discrepancy mechanism; therefore, polarization must remain aligned, rather than dispersion or ratios being significant.

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