4 papers
Another dual formulation of the separability problem
D. Salgado, J. L. Sanchez-Gomez, M. Ferrero
We show how the separability problem is dual to that of decomposing any given matrix into a conic combination of rank-one partial isometries, thus offering a duality approach diffe…
On nonlinear evolution and supraluminal communication between finite quantum systems
M. Ferrero, D. Salgado, J. L. Sanchez-Gomez
We revise the 'no-signaling' condition for the supraluminal communication between two spatially separated finite quantum systems of arbitrary dimensions, thus generalizing a simila…
A simple proof of the Jamiolkowski criterion for complete positivity of linear maps of algebras of Hilbert-Schmidt operators
D. Salgado, J. L. Sanchez-Gomez
We generalize a preceding simple proof of the Jamiolkowski criterion to check whether a given linear map between algebras of operators is completely positive or not. The generaliza…
A simple proof of the Jamiolkowski criterion for complete positivity of linear maps
D. Salgado, J. L. Sanchez-Gomez, M. Ferrero
We give a simple direct proof of the Jamiolkowski criterion to check whether a linear map between matrix algebras is completely positive or not. This proof is more accesible for ph…