Publications Repository - Gdańsk University of Technology

For a given pure state of a composite quantum system we analyze the product of its projections onto aset of locally orthogonal separable pure states. We derive a bound for this product analogous to theentropic uncertainty relations. For bipartite systems the bound is saturated for maximally entangled statesand it allows us to construct a family of entanglement measures, we shall call collectibility. As thesequantities are experimentally accessible, the approach advocated contributes to the task of experimentalquantification of quantum entanglement, while for a three-qubit system it is capable to identify thegenuine three-party entanglement.

Authors

• Łukasz Rudnicki,
• prof. dr hab. Paweł Horodecki link open in new tab ,
• Karol Życzkowski