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Which risk increases when cooling superconducting qubit circuits too rapidly?

A)Reduced phase coherence lifetime
B)Increased critical current density
C)Suppressed quasiparticle generation
D)Enhanced magnetic flux trapping

💡 Explanation

Rapid cooling can cause differential contraction of materials, stressing interfaces and phonon scattering increasing the density of defects; therefore, reduced phase coherence arises, because defects induce decoherence rather than improve coherence at low temperatures.

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