报告时间：1月2日下午3点
报告地点：近代物理系210会议室
报告人：周经纬 Jingwei Zhou (NEMS group), Aalto University
报告题目：Towards Multimode optomechanics in the quantum regime报告摘要：Cavity optomechanics allows us to cool the mechanical resonators into the ground state now. However, observation of quantum entanglement between two macroscopic mechanical oscillators is still very challenging.
Here we integrate high tension silicon nitride membranes into the three-dimensional superconducting microwave cavity and cool the mechanical motion near ground state. The mechanical quality factor of the membrane is about 3.9*10^7 with its frequency 700 kHz.
Our 3D optomechanical system allows for coupling the mechanical vibrations simultaneously to multiple cavity modes and provides a new route for the entanglement between mechanical resonators and detection of such entanglement.
