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arXiv 2602.07531quant-phphysics.optics
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增强的双通道干涉用于低品质因子悬浮微磁体的地面态冷却

Squeezing-enhanced dual-channel interference for ground-state cooling of a levitated micromagnet with low quality factor

Fuzhou University(福州大学);College of Physics and Information Engineering, Fuzhou University(福州大学物理与信息工程学院)

Lei Chen, Zhe-qi Yang, Liang Bin, Zhi-Rong Zhong

AI总结:

本研究提出一种基于 squeezing 增强量子干涉的双通道冷却方案,通过同时抑制加热散射和增强冷却散射,将实现地面态冷却所需的 Q_c 减少三个数量级,显著提高冷却效率。

摘要:

将宏观振子的中心质量(CM)运动冷却到量子基态是检验宏观尺度量子力学的基本前提。然而,目前实现这一目标受到对超高机械品质因子(Q_c)的严格要求的阻碍。在此,我们提出了一种基于混合悬浮腔-磁声学机械系统中 squeezing 增强的量子干涉的双通道冷却方案,以克服这一限制。通过将 squeezing 效应与磁子-CM 和腔-CM 通道之间的量子干涉相结合,我们的方案同时抑制斯托克斯(加热)散射,同时增强反斯托克斯(冷却)散射。我们证明,这种冷却机制将实现地面态冷却所需的临界 Q_c 减少了三个数量级,使其在实验可及的 Q_c ~ 10^4 范围内成为可能。此外,净冷却速率相比传统单通道冷却提高了近 180 倍。这种改进伴随着稳态 CM 占有率和冷却时间的减少,分别减少了两个数量级。重要的是,即使在未解析边带区域深处,这种增强性能仍保持稳健。我们的结果提供了一条可行的路径,通过主动控制冷却动力学来准备宏观量子态,从而放松对固有材料性质的限制。

英文摘要:

Cooling the center-of-mass (CM) motion of a macroscopic oscillator to its quantum ground state is a fundamental prerequisite for testing quantum mechanics at macroscopic scales. However, achieving this goal is currently hindered by the stringent requirement for an ultrahigh mechanical quality factor ($Q_c$). Here, we propose a dual-channel cooling scheme based on squeezing-enhanced quantum interference within a hybrid levitated cavity-magnomechanical system to overcome this limitation. By synergizing squeezing effects with quantum interference between the magnon-CM and cavity-CM channels, our scheme simultaneously suppresses Stokes (heating) scattering while enhancing anti-Stokes (cooling) scattering.~We demonstrate that this cooling mechanism reduces the critical $Q_c$ required for ground-state cooling by three orders of magnitude, making it achievable in the experimentally accessible regime of $Q_c \sim 10^4$. Furthermore, the net cooling rate is enhanced by nearly 180-fold compared to that of conventional single-channel cooling. This improvement is accompanied by a two orders of magnitude reduction in both the steady-state CM occupancy and the cooling time. Importantly, this enhanced performance remains robust even deep within the unresolved-sideband regime. Our results provide a feasible path toward preparing macroscopic quantum states by actively controlling the cooling dynamics, thereby relaxing the constraints on intrinsic material properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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