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Manuscript Title: libCreme: An optimization library for evaluating convex-roof entanglement measures
Authors: Beat Röthlisberger, Jörg Lehmann, Daniel Loss
Program title: libCreme
Catalogue identifier: AEKD_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 183(2012)155
Programming language: Matlab/Octave and C/C++.
Computer: All systems running Matlab or Octave.
Operating system: All systems running Matlab or Octave.
Keywords: Entanglement measure, Convex roof.
PACS: 03.67.Mn, 02.60.Pn.
Classification: 4.9, 4.15.

Nature of problem:
Evaluate convex-roof entanglement measures. This involves solving a non-linear (unitary) optimization problem.

Solution method:
Two algorithms are provided: A conjugate-gradient method using a differential-geometric approach and a quasi-Newton method together with a mapping to Euclidean space.

Running time:
Typically seconds to minutes for a density matrix of a few low-dimensional systems and a decent implementation of the pure-state entanglement measure.