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Polynomial method to study the entanglement of pure N-qubit states

Source: Phys. Rev. A 81, 012326 (2010); doi:10.1103/PhysRevA.81.012326

Published 26 January 2010

PACS
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • YEAR: 2010
PUBLICATION DATA
Publisher:
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H. Mäkelä and A. Messina
Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo, via Archirafi 36, I-90123 Palermo, Italy
We present a mapping which associates pure N-qubit states with a polynomial. The roots of the polynomial characterize the state completely. Using the properties of the polynomial we construct a way to determine the separability and the number of unentangled qubits of pure N-qubit states. ©2010 The American Physical Society
History: Received 12 August 2009; revised 3 November 2009; published 26 January 2010
Permalink: http://link.aps.org/abstract/PRA/v81/e012326
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