Effect of increasing spin in the fidelity of quantum communication through a tripartite spin chain

Abstract

We considered the problem of quantum state transfer through a tripartite linear chain of spins obeying the Heisenberg XY model, with Alice and Bob controlling the respective end. We studied the effect of changing the spin dimensionality of the channel on the behavior of fidelity through time. It turns out that the higher the spin of the channel, the earlier we achieve perfect or near perfect state transfer.