International Journal of Quantum Information, ( ISI ), Volume (6), No (4), Year (2008-10) , Pages (867-884)

Title : ( Thermal entanglelment in a two-qutrit system with nonlinear coupling under nonuniform external magnetic field )

Authors: Iman Sargolzahi , sayed yahya mirafzali , Mohsen Sarbishaei ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Abstract

We study the thermal entanglement of a 2-qutrit spin chain with nonlinear coupling in the presence of nonuniform magnetic field. Thermal entanglement of an arbitrary (finite-dimensional) m-partite system vanishes at some finite threshold temperature Ts. We investigate the dependence of Ts on the system’s parameters, i.e. the nonlinear coupling and the magnetic field, for this 2-qutrit system. In addition, we compare two lower bounds of I-concurrence for this system and also study its dense coding capacity as a function of system’s parameters.

Keywords

, Thermal entanglement; negativity; I, concurrence; dense coding capacity.