202 citations · 278 across the 13 of their papers we have counts for
4 papers · 1 filter
Entanglement and output entropy of the diagonal map
Meik Hellmund
We review some properties of the convex roof extension, a construction used, e.g., in the definition of the entanglement of formation. Especially we consider the use of symmetries…
Concurrence and Entanglement Entropy of Stochastic 1-Qubit Maps
Meik Hellmund, Armin Uhlmann
Explicit expressions for the concurrence of all positive and trace-preserving ("stochastic") 1-qubit maps are presented. We construct the relevant convex roof patterns by a new met…
An Entropy Inequality
Meik Hellmund, Armin Uhlmann
Let be the von Neumann entropy of an -dimensional quantum state and the second elementary symmetric polynomial of the eigenvalues of . We pr…
Concurrence of Stochastic 1-Qubit Maps
Meik Hellmund, Armin Uhlmann
Explicit expressions for the concurrence of all positive and trace-preserving ("stochastic") 1-qubit maps are presented. By a new method we find the relevant convex roof pattern. W…