Purification and correlated measurements of bipartite mixed states
| Autoři | |
|---|---|
| Rok publikování | 2002 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review A |
| Fakulta / Pracoviště MU | |
| Citace | |
| Obor | Informatika |
| Klíčová slova | quantum information theory; entanglement; separability; factorability |
| Popis | We prove that all purifications of a nonfactorable state (i.e., the state that cannot be expressed in a form $\rho_{AB}=\rho_A\otimes\rho_B$) are entangled. We also show that for any bipartite state there exists a pair of measurements that are correlated on this state if and only if the state is nonfactorable. |
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