Lower bounds on concurrence and negativity from a trace inequalityстатья
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Дата последнего поиска статьи во внешних источниках: 28 октября 2020 г.
Аннотация:For bipartite quantum states we obtain lower bounds on two important entanglement measures, concurrence and negativity, studying the inequalities for the expectation value of a projector on some subspace of the Hilbert space. Several applications, including analysis of stability of entanglement under various perturbations of a state, are discussed.