Lower bounds on concurrence and negativity from a trace inequality

K. V. Antipin

Published 2020-05-04Version 1

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.