A criterion for entanglement in two two-level systems
- Authors: FERRARO E; NAPOLI A; MESSINA A
- Publication year: 2007
- Type: Articolo in rivista (Articolo in rivista)
- OA Link: http://hdl.handle.net/10447/31317
Abstract
The exact entanglement evolution of two two-level systems, coupled to N surrounding spin \frac{1}{2} , is analysed with the help of a new criterion relying on the ability of measuring a few simple observables only.