The potentiality of quantum systems to be correlated leads to many fascinating applications of quantum information. For pure states, these correlations coincide with entanglement. Hence, the qualification and quantification of multipartite entanglement is one of the central topics within quantum information. Despite its relevance, however, many very fundamental questions in this context are still unanswered.

In this talk I will focus on some aspects of multipartite entanglement. I will present a generalization of the notion of maximally entangled bipartite states to the multipartite case and will demonstrate a new approach of quantifying entanglement of few-partite systems. More precisely, I will present two new operational classes of entanglement measures. Due to their clear operational meaning, these measures are applicable to systems of arbitrary sizes and dimensions, being prepared in either pure or mixed states. I will demonstrate how these measures can be utilized to uniquely characterize the entanglement contained in few-body systems.

I will then briefly talk about the case where only finitely many rounds of classical communication are used for entanglement manipulation.


Seminar, May 20, 2016, 12:00. ICFO’s Seminar Room

Hosted by Prof. Maciej Lewenstein