Cooling of a levitated nanoparticle to the motional quantum ground state
Cooling of a levitated nanoparticle to the motional quantum ground state
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DOI：
10.1126/science.aba3993
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发表时间：
2020-02-21
期刊：
影响因子：
56.9
通讯作者：
Aspelmeyer, Markus
中科院分区：
文献类型：
--
作者：
Delic, Uros;Reisenbauer, Manuel;Aspelmeyer, Markus
大尺寸和大质量复杂物体的量子控制为传感应用和基础物理测试提供了机会。实现物质的这种极端量子态仍然是一个重大挑战。我们展示了一个量子界面，结合了固体的光学捕获和腔介导的光物质相互作用。精确控制陷阱激光器相对于光腔的频率和位置，使我们能够将光学陷阱纳米粒子从室温激光冷却到其量子基态运动。该粒子由108个原子组成，类似于目前的玻色-爱因斯坦凝聚体，密度相当于固体。我们的冷却技术与光学陷阱操作相结合，可以实现涉及大质量的其他无法实现的叠加态。
Quantum control of complex objects in the regime of large size and mass provides opportunities for sensing applications and tests of fundamental physics. The realization of such extreme quantum states of matter remains a major challenge. We demonstrate a quantum interface that combines optical trapping of solids with cavity-mediated light-matter interaction. Precise control over the frequency and position of the trap laser with respect to the optical cavity allowed us to laser-cool an optically trapped nanoparticle into its quantum ground state of motion from room temperature. The particle comprises 108 atoms, similar to current Bose-Einstein condensates, with the density of a solid object. Our cooling technique, in combination with optical trap manipulation, may enable otherwise unachievable superposition states involving large masses.