Eigenvalues, separability and absolute separability of two-qubit states
Keywords: 81P05; 52A38; 15A90; 28A75; 03.67.-a; 02.30.Cj; 02.40.Ky; 02.40.Ft; Eigenvalues; Diagonal entries; SO(4); Two qubits; Arc-sine function; Hilbert-Schmidt metric; Bures metric; Minimal monotone metric; Separability functions; Absolute separability; Separa