Which limitation impacts quantum key distribution when fiber optic cable length expands due to thermal expansion?

💡 Explanation

When fibre optic cables expand, stress induced birefringence changes the polarization state of the photons. This alters their entanglement, causing reduced fidelity and therefore secure bit rate is lower. Reduced entanglement degrades key efficacy., rather than decoherence or increased polarisation drift requiring shorter transit distance.

• Which consequence results when pressurized water reactor coolant enrichment decreases?
• Which effect increases when optical fiber attenuation grows longer?
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• Which outcome results when nitrogen monoxide catalytic converter complex forms anti-bonding molecular orbital character?
• Which outcome results when a Carnot engine operates with irreversible heat transfer across a finite temperature difference?
• Which phenomenon complicates maintaining a constant freezing temperature during large-scale cryopreservation of biological tissues?