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← ScienceWhich mechanism disrupts secure quantum key distribution when atmospheric birefringence fluctuates rapidly?
A)Photon decoherence due to polarization drift✓
B)Spontaneous parametric down-conversion saturation
C)Superconducting qubit state entanglement decay
D)Reduced laser power exceeds detector threshold
💡 Explanation
Photon decoherence causes bit errors during QKD because atmospheric birefringence changes polarization; therefore link security is compromised, rather than maintaining ideal lossless entanglement due to static refraction conditions, impacting the security of the channel.
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