The Hamiltonian corrections induced by the action of coherent driving forces are often used to fight dissipative and decoherence mechanisms in experiments. For this reason, in the cases of two exactly solvable decoherence models, we propose a scheme for changing the quantum average speed of an open system by controlling an external unitary coherent driving Hamiltonian on the system. For the Markovian dynamics process, with a judicious choice of the coherent driving parameters, the tightness of quantum speed limit of the dynamics process can be weakened. That is to say, we may drive the open system to the quantum speedup evolution. And in the non-Markovian regime, the original quantum speedup dynamics may be brought to the greater degree of speedup by adding the coherent driving. Somewhat contrary to the previous speedup scenarios by the controllable non-Markovianity, the changes in the excited population and coherence caused by the coherent driving are the intrinsic physical reason for quantum speedup in our scheme.

在实验中，由相干驱动力作用引起的哈密顿修正常被用来与耗散和去相干机制作斗争。因此，在两个完全可解的退相干模型的情况下，我们提出了一种通过控制系统上的外部单一相干驱动哈密顿量来改变开放系统的量子平均速度的方案。对于马尔可夫动力学过程，通过明智地选择相干驱动参数，可以减弱动力学过程的量子速度极限的严格性。也就是说，我们可能会推动开放系统向量子加速发展。在非马尔可夫体系中，通过增加相干驱动，可以使原始的量子加速动力学具有更大的加速程度。