  Efficient control over entanglement in spin chains is useful for quantum
information processing applications. In this paper, we propose the use of a
combination of two different configurations of strong static and oscillating
fields to control and generate near-perfect entanglement between any two spins
in a spin chain, even in the presence of noise. This is made possible by the
fact that our control fields not only decouple the spin chain from its
environment but also selectively modify the spin-spin interactions. By suitably
tuning these spin-spin interactions via the control fields, we show that the
quantum state of any two spins in the spin chain can be made to be a Bell
state. We illustrate our results for various spin chains, such as the XY model,
the XYZ model, and the Ising spin chain.
