Research on reverse engineering strategy of state transfer for open quantum systems

Abstract

There has long been interest to control the transfer of population between specified quantum states and protect the coherence of the system at the same time. In this paper, from the perspective of engineering implementation, and based on the idea of reverse engineering, we propose a control scheme for state transfer of two-level open quantum system, which is to drive system from arbitrary initial state to desired target state. In order to ensure that the system can process information effectively, we design the control pulse in advance in terms of population number and coherence, and then verify the validity through numerical simulation. The results show that the system can be driven from any initial state to the desired target state by the designed control pulse, and the coherence of the system is well protected during the state transfer. The influences of environmental decoherence on population transfer and coherence control is further discussed. It reveals that the control pulse presented in this paper is robust to the variation of related parameters.