Simple algorithm for computing the geometric measure of entanglement
Alexander Streltsov, Hermann Kampermann, Dagmar Bruß · Physical Review A · 2011
We present an easy implementable algorithm for approximating the geometric measure of entanglement from above. The algorithm can be applied to any multipartite mixed state. It involves only the solution of an eigenproblem and finding a singular value decomposition; no further numerical techniques are needed. To provide examples, the algorithm was applied to the isotropic states of three qubits and the three-qubit $XX$ model with external magnetic field.