199 citations · 533 across the 30 of their papers we have counts for
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The disentangling power of unitaries
Lieven Clarisse, Sibasish Ghosh, Simone Severini +1
We define the disentangling power of a unitary operator in a similar way as the entangling power defined by Zanardi, Zalka and Faoro [PRA, 62, 030301]. A general formula is derived…
A generalization of boson normal ordering
Toufik Mansour, Matthias Schork, Simone Severini
In this paper we define generalizations of boson normal ordering. These are based on the number of contractions whose vertices are next to each other in the linear representation o…
Noncrossing normal ordering for functions of boson operators
Toufik Mansour, Matthias Schork, Simone Severini
Normally ordered forms of functions of boson operators are important in many contexts in particular concerning Quantum Field Theory and Quantum Optics. Beginning with the seminal w…
Combinatorial laplacians and positivity under partial transpose
Roland Hildebrand, Stefano Mancini, Simone Severini
Density matrices of graphs are combinatorial laplacians normalized to have trace one (Braunstein \emph{et al.} \emph{Phys. Rev. A,} \textbf{73}:1, 012320 (2006)). If the vertices o…
The Quantum Separability Problem for Gaussian States
Stefano Mancini, Simone Severini
Determining whether a quantum state is separable or entangled is a problem of fundamental importance in quantum information science. This is a brief review in which we consider the…
Grid polygons from permutations and their enumeration by the kernel method
Toufik Mansour, Simone Severini
A grid polygon is a polygon whose vertices are points of a grid. We define an injective map between permutations of length n and a subset of grid polygons on n vertices, which we c…