## Entanglement in eight-qubit graph states

##### Authors
Cabello, Adan
Lopez-Tarrida, Antonio J.
Moreno, Pilar
Portillo, Jose R.
##### Description
Any 8-qubit graph state belongs to one of the 101 equivalence classes under local unitary operations within the Clifford group. For each of these classes we obtain a representative which requires the minimum number of controlled-Z gates for its preparation, and calculate the Schmidt measure for the 8-partite split, and the Schmidt ranks for all bipartite splits. This results into an extension to 8 qubits of the classification of graph states proposed by Hein, Eisert, and Briegel [Phys. Rev. A 69, 062311 (2004)].
Comment: REVTeX4, 9 pages, 2 figures
Quantum Physics