激光脉冲驱动下双腔耦合系统的动力学特性

Dynamic characteristics of double cavity coupled system driven by laser pulse

在外加激光控制下,研究了含有两能级量子比特的双腔耦合系统的动力学行为。基于系统的相互作用哈密顿量,得出了系统量子态激发概率的解析解。通过数值模拟讨论了3种特定情况下系统的动力学特性:外加脉冲与腔场发生近共振、比特与腔模大失谐条件下,腔模的最大激发概率小于0.07,腔模处于非激发状态,比特的激发概率出现瞬时衰减;比特与腔模强耦合条件下,腔模的激发概率近似0.5,腔模处于半激发状态,比特的激发概率出现高频振荡;腔场之间大跳跃条件下,腔模的最大激发概率小于0.07,腔模处于非激发状态,比特的激发概率出现高频振荡。

Under control of applied laser pulse, the dynamical behavior of double cavity coupled system with a two-level quantum bit is investigated. Based on the system interaction Hamiltonian, the analytical solutions of system quantum state excited probability are obtained. The system dynamic characteristics are discussed by numerical simulation in three specific cases. In the case of applied laser resonating with cavity, bit and cavity field mismatching, the maximum excitation probability of cavity mode is less than 0.07. The cavity mode is in a non-excited state, and the bit excitation probability appears instantaneous decay. Under the condition of strong coupling between bit and cavity mode, the excitation probability of cavity mode is approximately 0.5. The cavity mode is in the state of semi-excitation, and the bit excitation probability appears high frequency oscillation. Under the condition of large jumping between cavity fields, the maximum excitation probability of cavity mode is less than 0.07. The cavity mode is in the non-excited state, and the bit excitation probability appears high frequency oscillation