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← ScienceWhich consequence limits quantum key distribution range because of entanglement?
A)Photon decoherence reduces entanglement fidelity✓
B)Polarization drift alters entangled photon pairs
C)Wave function collapse scrambles qubits
D)Superposition interference increases decryption errors
💡 Explanation
Photon decoherence degrades the entanglement needed for secure key exchange. Entanglement is disrupted by environmental interactions through the mechanism of quantum decoherence; therefore secure communication distance decreases, rather than secure keys propagating indefinitely thanks to error correction.
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