114 citations · 342 across the 12 of their papers we have counts for
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gr-qc2005
Anti-de Sitter space, squashed and stretched
Ingemar Bengtsson, Patrik Sandin
We study the Lorentzian analogues of the squashed 3-sphere, namely 2+1 dimensional anti-de Sitter space, squashed or stretched along fibres that are either spacelike or timelike. T…
quant-ph2005
On the structure of the body of states with positive partial transpose
Stanislaw Szarek, Ingemar Bengtsson, Karol Zyczkowski
We show that the convex set of separable mixed states of the 2 x 2 system is a body of constant height. This fact is used to prove that the probability to find a random state to be…