Projects per year
Abstract
We discuss under which conditions multipartite entanglement in mixed quantum states can be characterized only in terms of twopoint connected correlation functions, as it is the case for pure states. In turn, the latter correlations are defined via a suitable combination of (disconnected) one and twopoint correlation functions. In contrast to the case of pure states, conditions to be satisfied turn out to be rather severe. However, we were able to identify some interesting cases, as when the pointindependence is valid of the onepoint correlations in each possible decomposition of the density matrix, or when the operators that enter in the correlations are (semi)positive/negative defined.
Original language  English 

Article number  305302 
Journal  Journal of Physics A: Mathematical and Theoretical 
Volume  56 
Issue number  30 
Early online date  11 Jul 2023 
DOIs  
Publication status  Published  28 Jul 2023 
Keywords
 functions
 correlations
 connected
 characterized
 multipartite
 entanglements
Fingerprint
Dive into the research topics of 'Can multipartite entanglement be characterized by twopoint connected correlation functions?'. Together they form a unique fingerprint.Projects
 2 Finished

Programmable Atomic LargeScale Quantum Simulation PASQUANS  EU FETFLAG (Quantum Simulation)
European Commission  Horizon 2020
1/10/18 → 30/09/21
Project: Research