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.
Makela, H., Messina, A. (2010). Polynomial method to study the entanglement of pure N-qubit states. PHYSICAL REVIEW A, 81(1), 012326-1-012326-6 [10.1103/PhysRevA.81.012326].
Polynomial method to study the entanglement of pure N-qubit states
MESSINA, Antonino
2010-01-01
Abstract
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.
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