Introduces a localization probability lambda for quantum states in subspaces that is stricter than standard overlap Tr(P rho), derived from Schur complement operator decomposition and possessing concavity and super-additivity.
The statement is also immediate from the structure of the Schur complement, namely,B=a−b †c−1b
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Localization of quantum states within subspaces
Introduces a localization probability lambda for quantum states in subspaces that is stricter than standard overlap Tr(P rho), derived from Schur complement operator decomposition and possessing concavity and super-additivity.