Quantum collective motion of macroscopic mechanical oscillators

• 成果类型: Article
• 署名作者: Chegnizadeh, Mahdi; Scigliuzzo, Marco; Youssefi, Amir; Kono, Shingo; Guzovskii, Evgenii; Kippenberg, Tobias J.
• 署名单位: Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9356
• DOI: 10.1126/science.adr8187
• 发表日期: 2024-12-20
• 页码: 1383-1388
• 关键词: entanglement; light

摘要

Collective phenomena arise from interactions within complex systems, leading to behaviors absent in individual components. Observing quantum collective phenomena with macroscopic mechanical oscillators has been impeded by the stringent requirement that oscillators be identical. We demonstrate the quantum regime for collective motion of N = 6 mechanical oscillators, a hexamer, in a superconducting circuit optomechanical platform. By increasing the optomechanical couplings, the system transitions from individual to collective motion, characterized by a N enhancement of cavity-collective mode coupling, akin to superradiance of atomic ensembles. Using sideband cooling, we prepare the collective mode in the quantum ground state and measure its quantum sideband asymmetry, with zero-point motion distributed across distant oscillators. This regime of optomechanics opens avenues for studying multipartite entanglement, with potential advances in quantum metrology.