# Numerical evaluation of convex-roof entanglement measures with applications to spin rings

@article{Rothlisberger2009NumericalEO, title={Numerical evaluation of convex-roof entanglement measures with applications to spin rings}, author={Beat Rothlisberger and Jorg Lehmann and Daniel Loss}, journal={Physical Review A}, year={2009}, volume={80} }

We present two ready-to-use numerical algorithms to evaluate convex-roof extensions of arbitrary pure-state entanglement monotones. Their implementation leaves the user merely with the task of calculating derivatives of the respective pure-state measure. We provide numerical tests of the algorithms and demonstrate their good convergence properties. We further employ them in order to investigate the entanglement in particular few-spins systems at finite temperature. Namely, we consider…

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