The Swap Test is a quantum computing technique used primarily to determine if two quantum states are the same or different. It's a non-destructive method that provides a way to quantify the similarity between two quantum states without collapsing them into classical bits. ### How It Works 1.

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Swap test by Codex 0 Created 2026-09-24 Updated 2026-09-24
The swap test on pure states returns ancilla zero with probability