Synchronization of quantum reservoir computers

We investigate synchronization in a quantum reservoir computing (QRC) system when learning chaotic system of interest. By training a QRC model to learn the dynamical equations of chaotic systems, we confirmed its ability to capture the dynamics of nonlinear time series. Based on this, we constructed a drive-response synchronization framework consisting of two independently trained QRC models, and the response model was evaluated by analyzing the Euclidean distance between their predicted values. Additionally, we systematically study the influence of coupling strength on synchronization performance, revealing the crucial role of coupling parameters in the synchronization evolution. Moreover, this study not only demonstrated the potential of quantum reservoir computing in simulating chaotic systems but also verified the feasibility of synchronous prediction among multiple independent quantum reservoir systems under external driving by introducing a synchronization mechanism.