Extremal Entangled Four-Qubit Pure States with Respect to Multiple Entropy Measures
Dan Liu, Zhao Xin, Long Gui-Lu · Communications in Theoretical Physics · 2008
Four-qubit entanglement has been investigated using a recent proposed entanglement measure, multiple entropy measures (MEMS). We have performed optimization for the nine different families of states of four-qubit system. Some extremal entangled states have been found.