Which observation prevents immediate relativistic quantum key distribution?

💡 Explanation

Decoherence prevents sustained entanglement because interaction with the environment destroys phase coherence, preventing correlation; therefore, polarisation modes must be absolutely isolated, rather than signal strength or timing, for long-range quantum channels.

• Which consequence results when the cut-off frequency is exceeded in surface acoustic wave (SAW) device?
• Which mechanism enables electron transitions in quantum dots?
• Which mechanism causes increased hydraulic losses within unbaffled chemical mixing tanks?
• Which phenomenon results in scanning tunneling microscopy when electrons encounter a vacuum gap?
• Which mechanism influences semiconductor breakdown when increasing ambient temperature narrows gaps?
• Which outcome occurs when imperfections cause electron confinement?