title: Method for direct detection of quantum entanglement.
abstract: Basing on positive maps separability criterion we propose the experimentally viable, direct detection of quantum entanglement. It is efficient and does not require any a priori knowledge about the state. For two qubits it provides a sharp (i.e., "if and only if") separability test and estimation of amount of entanglement. We view this method as a new form of quantum computation, namely, as a decision problem with quantum data structure.
authors.affiliation: Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, 80-952 Gdańsk, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Horodecki
authors.forename: Artur
authors.initials: A
authors.lastname: Ekert