83 citations · 223 across the 5 of their papers we have counts for
9 papers · 1 filter
The shape of higher-dimensional state space: Bloch-ball analog for a qutrit
Christopher Eltschka, Marcus Huber, Simon Morelli +1
Geometric intuition is a crucial tool to obtain deeper insight into many concepts of physics. A paradigmatic example of its power is the Bloch ball, the geometrical representation…
Maximum -body correlations do not in general imply genuine multipartite entanglement
Christopher Eltschka, Jens Siewert
The existence of correlations between the parts of a quantum system on the one hand, and entanglement between them on the other, are different properties. Yet, one intuitively woul…
Joint Schmidt-type decomposition for two bipartite pure quantum states
Christopher Eltschka, Jens Siewert
It is well known that the Schmidt decomposition exists for all pure states of a two-party quantum system. We demonstrate that there are two ways to obtain an analogous decompositio…
Dimensionally sharp inequalities for the linear entropy
Simon Morelli, Claude Klöckl, Christopher Eltschka +2
We derive an inequality for the linear entropy, that gives sharp bounds for all finite dimensional systems. The derivation is based on generalised Bloch decompositions and provides…
Exponentially many entanglement and correlation constraints for multipartite quantum states
Christopher Eltschka, Felix Huber, Otfried Gühne +1
We present a family of correlations constraints that apply to all multipartite quantum systems of finite dimension. The size of this family is exponential in the number of subsyste…
Partial transpose as a direct link between concurrence and negativity
Christopher Eltschka, Geza Toth, Jens Siewert
Detection of entanglement in bipartite states is a fundamental task in quantum information. The first method to verify entanglement in mixed states was the partial-transpose criter…