Entanglement storage through a spin ladder with cyclic interaction
School of Physical Science and Technology, Soochow
University, Suzhou, Jiangsu, 215006, P.R. China
Revised: 22 July 2010
Published online: 5 November 2010
The entanglement dynamics of two qubits coupled to a two-leg spin ladder with cyclic interaction is investigated. The entanglement is a periodic function of time and is affected by both the cyclic interaction in the ladder and the exchange interaction between the qubits and the ladder. If the number of spins in the ladder is increased with suitable external magnetic field, the maximum entanglement can exist for quite long time. Thus the entangled states can be stored and even can be “trapped” with high entanglement. The quantum manipulation of quantum states is possible in such systems.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010