Maximizing the entanglement of two mixed qubits

W. J. Munro, D. F. V. James, A. G. White, P. G. Kwiat

Published 2001-03-20Version 1

Two-qubit states occupy a large and relatively unexplored Hilbert space. Such states can be succinctly characterized by their degree of entanglement and purity. In this letter we investigate entangled mixed states and present a class of states that have the maximum amount of entanglement for a given linear entropy.