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• Direct detection of quantum entanglement

  Publikacja

  • P. Horodecki
  • A. Ekert

  - PHYSICAL REVIEW LETTERS - Rok 2002

  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.