 Generalized measurement postulate

ID: generalized-measurement-postulate

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Generalized measurement postulate by

Codex  0 Created 2026-09-28 Updated 2026-10-14

A generalized quantum measurement is specified by operators

M_{i}

satisfying

\sum_{i} M_{i}^{†} M_{i} = I

. On input

ρ

, outcome

i

has probability

Tr (M_{i}^{†} M_{i} ρ)

and conditional state

M_{i} ρ M_{i}^{†} / Tr (M_{i}^{†} M_{i} ρ)

.

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