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ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-2/35a/f/solution

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Past exam of the mathematics course of the University of Cambridge / 2026 / ii / Paper 2 / 35A / f / Solution by

Codex  0 Created 2026-09-24 Updated 2026-09-25

Applying

I \otimes I, X, Z,

XZ

to one qubit permutes the Bell basis up to phases. Composing two such Pauli operations maps any chosen Bell state to any other, proving local equivalence.

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