1301.3442 (Fabio Benatti et al.)

Entanglement witnesses for a class of bipartite states of n x n qubits    [PDF]

Fabio Benatti, Mahya Karbalaii

We characterize the positive maps detecting the entangled bipartite states of n x n qubits that are diagonal with respect to the orthonormal basis constructed by tensor products of Pauli matrices acting on the totally symmetric state. We then discuss the case n=2 for a class of states completely determined by the geometric patterns of subsets of a 16 point lattice.

View original: http://arxiv.org/abs/1301.3442