Naslov
Surface entanglement in quantum spin networks

Autori
Zippilli, Stefano ; Giampaolo, Salvatore Marco ; Illuminati, Fabrizio

Izvornik
Physical review, A, Atomic, molecular, and optical physics (1050-2947) 87 (2013), 4; 042304, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
entanglement

Sažetak
We study the ground-state entanglement in systems of spins forming the boundary of a quantum spin network in arbitrary geometries and dimensionality. We show that as long as they are weakly coupled to the bulk of the network, the surface spins are strongly entangled, even when distant and not directly interacting, thereby generalizing the phenomenon of long-distance entanglement occurring in quantum spin chains. Depending on the structure of the couplings between surface and bulk spins, we discuss in detail how the patterns of surface entanglement can range from multipair bipartite to fully multipartite. In the context of quantum information and communication, these results find immediate application to the implementation of quantum routers, that is, devices able to distribute quantum correlations on demand among multiple network nodes.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA