TL;DR
This paper discusses convex roof extensions in quantum information theory, presenting tools like Wootter's method, subtraction procedures, and symmetry applications to aid their analysis.
Contribution
It introduces practical tools and methods for analyzing convex roof extensions, enhancing understanding and computation in quantum entanglement measures.
Findings
Descriptions of Wootter's method
Introduction of subtraction procedures
Use of symmetries in convex roof analysis
Abstract
Convex roof extensions are widely used to create entanglement measures in quantum information theory. The aim of the article is to present some tools which could be helpful for their treatment. Sections 2 and 3 introduce into the subject. It follows descriptions of Wootter's method, of the "subtraction procedure", and examples on how to use symmetries.
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