  Quantum technologies able to manipulating single quantum systems, are
presently developing. Among the dowries of the quantum realm, entanglement is
one of the basic resources for the novel quantum revolution. Within this
context, one is faced with the problem of protecting the entanglement when a
system state is manipulated. In this paper, we investigate the effect of the
classical driving field on the generation entanglement between two qubits
interacting with a bosonic environment. We discuss the effect of the classical
field on the generation of entanglement between two (different) qubits and the
conditions under which it has a constructive role in protecting the
initial-state entanglement from decay induced by its environment. In
particular, in the case of similar qubits, we locate a stationary sub-space of
the system Hilbert space, characterized by states non depending on the
environment properties as well as on the classical driving-field. Thus, we are
able to determine the conditions to achieve maximally entangled stationary
states after a transient interaction with the environment. We show that,
overall, the classical driving field has a constructive role for the
entanglement protection in the strong coupling regime. Also, we illustrate that
a factorable initial-state can be driven in an entangled state and, even, in an
entangled steady-state after the interaction with the environment.
