arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2107.09526cond-mat.stat-mechphysics.atom-phquant-ph
收藏

耗散光晶格中激光冷却原子的反常统计

Anomalous statistics of laser-cooled atoms in dissipative optical lattices

Gadi Afek, Nir Davidson, David A. Kessler, Eli Barkai

AI总结:

本研究利用激光冷却原子系综的动量依赖耗散摩擦力特性,以其为反常扩散动力学测试平台,结合无限遍历理论工具分析稀有事件,揭示系统动力学转变,为统计物理基本概念提供新见解。

摘要:

扩散现象广泛存在于自然界的众多物理系统中,其普适性源于中心极限定理的普遍性。约一个世纪前,人们认识到这类动力学可延伸出“反常”扩散形式,即分布允许存在重尾的幂律尾部。激光冷却原子系综因其依赖动量的耗散摩擦力这一独特特性,可作为此类动力学的测试平台。激光冷却与反常动力学之间的相互作用,对平衡态与非平衡态统计物理学中的基本概念具有深刻的预测意义。冷原子实验中高度的可控性允许调节摩擦力的参数,从而揭示系统动力学特性的转变。利用从无限遍历理论改编的工具,动量分布和空间分布中的稀有事件可通过非归一化态来描述。这带来了新的实验与理论结果,阐明了系统的各类特性。

英文摘要:

Diffusion occurs in numerous physical systems throughout nature, drawing its generality from the universality of the central limit theorem. Around a century ago it was realized that an extension to this type of dynamics can be obtained in the form of ``anomalous" diffusion where distributions are allowed to have heavy, power-law tails. Due to a unique feature of its momentum-dependant dissipative friction force, laser-cooled atomic ensembles can be used as a test bed for such dynamics. The interplay between laser cooling and anomalous dynamics bears deep, predictive implications for fundamental concepts in both equilibrium and non-equilibrium statistical physics. The high degree of control available in cold-atom experiments allows for tuning of the parameters of the friction force, revealing transitions in the dynamical properties of the system. Rare events, in both the momentum and spatial distributions, are described by non-normalized states using tools adapted from infinite ergodic theory. This leads to new experimental and theoretical results, illuminating the various features of the system.

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。

↑