1Department of Automation, Tsinghua University, Beijing 100084, China
2Beijing Academy of Quantum Information Sciences, Beijing 100193, China
3Department of Electrical and Systems Engineering, Washington University, St. Louis, Missouri 63130, USA
4Institute of Microelectronics, Tsinghua University, Beijing 100084, China
5Center for Quantum Information Science and Technology, BNRist, Beijing 100084, China
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 ()-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 -symmetric systems and synchronization.