Hao-Nan Qiang

Radial Convex Geometry of Quantum States and Its Relation to Best Separable Approximation

We study bipartite entanglement from the convex geometry of quantum states. Taking the maximally mixed state as a reference point, we define a geometric entangled-space quantity $G(\rho)=[1-L(\rho)]/L(\rho)$ from the relative positions of the separable and quantum-state boundaries, and introduce a relative entanglement...