Two Local Observables are Sufficient to Characterize Maximally Entangled States of N Qubits

Fengli Yan, Ting Gao, Eric Chitambar

Maximally entangled states (MES) represent a valuable resource in quantum information processing. In $N$-qubit systems the MES are $N$-GHZ states, i.e. the collection of $\ket{GHZ_…