114 citations · 416 across the 19 of their papers we have counts for
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quant-ph2012★ 11 cited
Dissecting the qutrit
Gniewomir Sarbicki, Ingemar Bengtsson
To visualize a higher dimensional object it is convenient to consider its two-dimensional cross-sections. The set of quantum states for a three level system has eight dimensions. W…
gr-qc2012★ 3 cited
What are extremal Kerr Killing vectors up to?
Jan E. Aman, Ingemar Bengtsson, Helgi F. Runarsson
In the extremal Kerr spacetime the horizon Killing vector field is null on a timelike hypersurface crossing the horizon at a fixed latitude, and spacelike on both sides of the hori…