ELFT HÍRADÓ

[Szeminárium koordinátor <szfi-seminar AT wigner.mta.hu>]

SZFI Seminar
Szalay Szilárd
(Wigner FK SZFI)
Permutation invariant multipartite entanglement and correlations
We briefly review the partial separability based classification of mixed 
states of multipartite quantum systems of arbitrary number of subsystems, and 
show how this structure simplifies in the case when not entanglement but 
correlation is considered. As special cases, we consider the notions of 
k-separability and k-producibility (as well as their correlational versions), 
and reveal how these are dual to each other. This duality can be seen from a 
much wider perspective, when we consider the entanglement and correlational 
properties which are invariant under the permutations of the subsystems. This 
general treatment reveals a new property, which we call k-stretchability of 
entanglement, being sensitive in a balanced way to both the maximal size of 
correlated (or entangled) subsystems and the minimal number of subsystems 
uncorrelated (or separable) from one another. We also give the corresponding 
multipartite correlation and entanglement monotones, being the natural 
generalizations of mutual information, entanglement entropy and entanglement 
of formation or relative entropy of entanglement, showing the same lattice 
structure as the classification (multipartite monotonicity). As illustration, 
we show some examples coming from molecular physics.Tuesday, 5 October 2021, 
10:00
Bldg.1, auditorium,  
https://teams.microsoft.com/l/meetup-join/19%3ace423c05cd1543ab9f9905886590ad69%40thread.tacv2/1633153083316?context=%7b%22Tid%22%3a%224d7ddeef-14ff-4911-8c11-401c69384d77%22%2c%22Oid%22%3a%22969d2d4a-5ba8-43f1-bd69-93f0998b025f%22%7d
Language of the talk: English
All interested are welcome!
Róbert Juhászszfi-seminar AT wigner.mta.hu

The seminar is a hybrid event. The number of participants present in the 
meeting room is limited to 20. Wearing a mask is mandatory.