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耦合微谐振子阵列构建声子网络的一个重大挑战是热噪声的影响,抑制热噪声可通过光力冷却方法达到。通过对所需的集体振动模进行选择性光力冷却,可获得一个量子态传递的窗口,用于实现量子信息在不同网络节点之间的传递。通过构建基于微悬臂梁阵列的Fabry-Pérot腔光力系统,在不同悬臂梁上对集体振动模进行光力冷却,结果表明各个集体模的冷却效率存在显著差异。进一步分析发现光力冷却效率与集体模在悬臂梁上的分布具有依赖性。通过选择集体模分布大的悬臂梁进行冷却,可以实现该集体模的选择性冷却。
One of the major challenges in building a phonon network with coupled micronic-harmonic subarrays is the influence of thermal noise, which can be achieved by optical cooling. By selectively cooling the desired collective modes of vibration, a quantum state transfer window can be obtained for the transfer of quantum information between different network nodes. By constructing a Fabry-Pérot cavity optical system based on a micro-cantilever beam array, the collective vibration modes are cooled by light on different cantilevers. The results show that there are significant differences in the cooling efficiency of each mode. Further analysis shows that the cooling efficiency of the optical power is dependent on the distribution of the collective mode on the cantilever. Selective cooling of the collective die can be achieved by cooling the large cantilever beam with collective mode distribution.