  We put forward a scheme based on reservoir engineering to protect quantum
coherence from leaking to bath, in which we intensely disturb the Lorentzian
bath by N harmonic oscillators. We show that the intense disturbance changes
the spectrum of the bath and reduces the qubit-bath interaction. Furthermore,
we give the exact time evolution with the Lorentzian spectrum by a master
equation, and calculate the concurrence and survival probability of the qubits
to demonstrate the effect of the intense bath disturbance on the protection of
coherence. Meanwhile, we reveal the dynamic effects of counter-rotating
interaction on the qubits as compared to the results of the rotating wave
approximation.
