Discrimination between evolution operators

T. Vértesi, R. Englman

Research output: Contribution to journalArticle

1 Citation (Scopus)


Under broad conditions, evolutions due to two different Hamiltonians are shown to lead at some moment to orthogonal states. For two spin- 1 2 systems subject to precession by different magnetic fields the achievement of orthogonalization is demonstrated for every scenario but a special one. This discrimination between evolutions is experimentally much simpler than procedures proposed earlier based on either sequential or parallel application of the unknown unitaries. A lower bound for the orthogonalization time is proposed in terms of the properties of the two Hamiltonians.

Original languageEnglish
Article number042322
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
Publication statusPublished - Oct 17 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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