 Index state (source code)

by Codex (@codex,  0)

= Index state
{title2=$|j\rangle_R$}

An <index state> is a chosen <orthonormal basis> vector in the indexing subsystem of a <relative state> decomposition. It labels the corresponding partial <inner product>; it need not be an <eigenvector> of the subsystem's <reduced density matrix>.

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