title: Entanglement capabilities of nonlocal Hamiltonians.
abstract: We quantify the capability of creating entanglement for a general physical interaction acting on two qubits. We give a procedure for optimizing the generation of entanglement. We also show that a Hamiltonian can create more entanglement if one uses auxiliary systems.
authors.affiliation: Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: W
authors.initials: W
authors.lastname: Dür
authors.forename: G
authors.initials: G
authors.lastname: Vidal
authors.forename: J I
authors.initials: JI
authors.lastname: Cirac
authors.forename: N
authors.initials: N
authors.lastname: Linden
authors.forename: S
authors.initials: S
authors.lastname: Popescu