ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

Habilitációs előadásSzalay SzilárdHUN-REN Wigner FK SZFIMultipartite 
entanglement and correlation2025. március 4. kedd, 10.00, KFKI Telephely, I. 
épület 1. emeleti TanácsteremEntanglement is the most remarkable 
manifestation of the nonclassical behaviour of quantum systems, still 
puzzling the community for almost a hundred years. A bipartite quantum system 
can either be separable or entangled, while in the multipartite case 
entanglement has a rich structure with many exciting features. In this talk, 
after recalling some basics of entanglement theory, we outline some of our 
main contributions to the field as follows. The natural generalisation of the 
separable/entangled dichotomy to multipartite systems is the partial 
separability classification, which we worked out for arbitrary number of 
discrete finite subsystems, resulting in a nice three-level building of 
order-theoretical constructions. Permutation invariant multipartite 
entanglement properties represent an important special case, among which the 
one-parameter families, e.g., k-producibility or k-partitionability, are even 
more important even more special cases. We formulate observable-independent 
entropic entanglement measures for all the multipartite entanglement 
properties, and also entanglement-depth like quantities for the one-parameter 
families, the convex version of which lead to strong metrological 
multipartite entanglement criteria. Minden érdeklődőt szívesen látunk! - 
Everyone is welcome to attend.Nagy Attilasem-admin AT szfki.hu