Genuine Tripartite Entanglement in a Spin-Star Network at Thermal Equilibrium
- Autori: Militello, B.; Messina, A.
- Anno di pubblicazione: 2011
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Entanglement, Termodinamica, Spin
In a recent paper [M. Huber et al, Phys. Rev. Lett. 104, 210501 (2010)] new criteria to find out the presence of multipartite entanglement have been given. We exploit these tools in order to study thermal entanglement in a spin-star network made of three peripheral spins interacting with a central one. Genuine tripartite entanglement is found in a wide range of the relevant parameters. A comparison between predictions based on the new criteria and those based on the tripartite negativity is also made.