libCreme: An optimization library for evaluating convex-roof entanglement measures

TL;DR

libCreme is a software library designed to efficiently compute convex-roof entanglement measures of mixed quantum states, facilitating research in quantum information by solving complex optimization problems.

Contribution

The paper introduces libCreme, a novel software library that implements algorithms for calculating convex-roof entanglement measures, with detailed theoretical and implementation insights.

Findings

Successfully computes entanglement measures in realistic systems

Compatible with Matlab and Octave platforms

Includes optimized C/C++ routines for performance

Abstract

We present the software library libCreme which we have previously used to successfully calculate convex-roof entanglement measures of mixed quantum states appearing in realistic physical systems. Evaluating the amount of entanglement in such states is in general a non-trivial task requiring to solve a highly non-linear complex optimization problem. The algorithms provided here are able to achieve to do this for a large and important class of entanglement measures. The library is mostly written in the Matlab programming language, but is fully compatible to the free and open-source Octave platform. Some inefficient subroutines are written in C/C++ for better performance. This manuscript discusses the most important theoretical concepts and workings of the algorithms, focussing on the actual implementation and usage within the library. Detailed examples in the end should make it easy for the user to apply libCreme to specific problems.