发表机构
ITMO University; Institute for Problems in Mechanical Engineering RAS（ITMO大学; 俄罗斯科学院机械问题研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文理论研究了四极阱中带电微粒在主参数共振附近的随机切换行为，揭示了热噪声与耗散平衡机制，并提出基于有效势垒的噪声感知检测方案。
AI 中文摘要
我们在理论上研究了在大气压下，四极阱中带电微粒在主参数共振附近的随机切换动力学。我们表明，这种行为源于热噪声激活的逃逸与耗散返回之间的平衡，这两种过程发生在粒子运动的线性和非线性动力学区域之间。切换遵循有效的吉布斯分布，区域之间存在有效的势垒和有效的系统温度，这两者均可通过实验测量。由于有效势垒依赖于粒子质量和电荷，且热噪声揭示而非掩盖了转变，这种指数依赖关系可为精确的噪声感知检测方案奠定基础。该系统还提供了一个高度可调的平台，用于研究非平衡参数系统中的激活动力学。
英文摘要
We have theoretically investigated the stochastic switching dynamics of a charged microparticle in a quadrupole trap near the principal parametric resonance at atmospheric pressure. We show that this behavior arises from a balance of thermal noise-activated escape and dissipative return between linear and nonlinear dynamical regimes of the particle motion. The switching follows an effective Gibbs distribution with an effective potential barrier between the regimes and effective system temperature, which are both experimentally accessible. Because the effective barrier depends on particle mass and charge, and since thermal noise reveals rather than obscures the transition, this exponential dependence could provide the foundation to precision noise-aware detection schemes. The system further offers a highly adjustable platform for studying activation dynamics in non-equilibrium parametric systems.
Commentsletter, 6 pages, 3 pages
