摘要
Synchronization has great impacts in various fields such as self-clocking,communication,and neural networks.Here,we present a mechanism of synchronization for two mechanical modes in two coupled optomechanical resonators with a parity-time(PT)-symmetric structure.It is shown that the degree of synchronization between the two far-off-resonant mechanical modes can be increased by decreasing the coupling strength between the two optomechanical resonators due to the large amplification of optomechanical interaction near the exceptional point.Additionally,when we consider the stochastic noises in the optomechanical resonators by working near the exceptional point,we find that more noises can enhance the degree of synchronization of the system under a particular parameter regime.Our results open up a new dimension of research for PT-symmetric systems and synchronization.
基金
National Natural Science Foundation of China(11674194,12004044)
National Defense Basic Scientific Research Program of China(JCKY2019407C002)
National Key Research and Development Program of China(2014CB921401)
Tsinghua Initiative Scientific Research Program
Tsinghua National Laboratory for Information Science and Technology
Beijing National Research Center for Information Science and Technology
National Science Foundation(EFMA1641109)
Army Research Office(W911NF1210026,W911NF1710189)
Joint Fund of Science&Technology Department of Liaoning Province and State Key Laboratory of Robotics,China(2021-KF-22-01)
Guoqiang Research Institute of Tsinghua University(20212000704)。
