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Which consequence results when two entangled photons pass optical fibers under differential stress?

A)Polarization correlation degrades significantly
B)Refractive index becomes isotropic
C)Phase coherence becomes entirely constructive
D)Group velocity dispersion becomes negligible

💡 Explanation

Differential stress alters each fiber's refractive index, causing varying propagation delays and polarization changes. Because Quantum decoherence degrades the original quantum entanglement; therefore, polarization correlation decreases, rather than changes in optical isotropy or fiber dispersion.

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