92 citations · 501 across the 27 of their papers we have counts for
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quant-ph2012★ 35 cited
When is a pure state of three qubits determined by its single-particle reduced density matrices?
Adam Sawicki, Michael Walter, Marek Kuś
Using techniques from symplectic geometry, we prove that a pure state of three qubits is up to local unitaries uniquely determined by its one-particle reduced density matrices exac…
quant-ph2012★ 53 cited
Four-qubit entangled symmetric states with positive partial transpositions
J. Tura, R. Augusiak, P. Hyllus +3
We solve the open question of the existence of four-qubit entangled symmetric states with positive partial transpositions (PPT states). We reach this goal with two different approa…