0000000000977349
AUTHOR
D Teresi
Thermal localizable entanglement in a simple multipartite system
The quantum correlations present in a system of three coupled spins 12 in a thermal state are investigated. Localizable entanglement, as well as concurrence function, is exactly evaluated. The results obtained show the existence of a temperature range corresponding to which it is impossible to localize entanglement.
BUILDING AN ENTANGLEMENT MEASURE ON PHYSICAL GROUND
We introduce on physical grounds a new measure of multipartite entanglement for pure states. The function we define is discriminant and monotone under LOCC and moreover can be expressed in terms of observables of the system.