24 citations
3 papers
Maximally entangled mixed states for qubit-qutrit systems
Paulo E. M. F. Mendonca, Marcelo A. Marchiolli, Samuel R. Hedemann
We consider the problems of maximizing the entanglement negativity of X-form qubit-qutrit density matrices with (i) a fixed spectrum and (ii) a fixed purity. In the first case, the…
Maximally genuine multipartite entangled mixed X-states of N-qubits
Paulo E. M. F. Mendonca, Seyed Mohammad Hashemi Rafsanjani, Diógenes Galetti +1
For every possible spectrum of -dimensional density operators, we construct an -qubit X-state of same spectrum and maximal genuine multipartite (GM-) concurrence, hence cha…
Heuristic for estimation of multiqubit genuine multipartite entanglement
Paulo E. M. F. Mendonca, Marcelo A. Marchiolli, Gerard J. Milburn
For every N-qubit density matrix written in the computational basis, an associated "X-density matrix" can be obtained by vanishing all entries out of the main- and anti-diagonals.…