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Stabilizer group

Stabilizer subspace

For a <stabilizer group> $G=\langle g_1,\ldots,g_l\rangle$, the <orthogonal projector> onto its <stabilizer subspace> is
$$
\Pi_G=\frac1{|G|}\sum_{g\in G}g
=\prod_{i=1}^l\frac{I+g_i}{2}.
$$

Stabilizer-projector formula

Balanced spectrum of a nonidentity stabilizer

Past exam of the mathematics course of the University of Cambridge / 2008 / iii / Paper 60 / 4 / Solution

Past exam of the mathematics course of the University of Cambridge / 2022 / iii / Paper 324 / 2 / v / Solution

Stabilizer code

Stabilizer-projector formula

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Stabilizer-projector formula

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