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Subdiffusive energy transport and antipersistent correlations due to the scattering of phonons and discrete breathers
Physical Review E ( IF 2.4 ) Pub Date : 2022-09-13 , DOI: 10.1103/physreve.106.l032201 Daxing Xiong 1 , Jianjin Wang 2
Physical Review E ( IF 2.4 ) Pub Date : 2022-09-13 , DOI: 10.1103/physreve.106.l032201 Daxing Xiong 1 , Jianjin Wang 2
Affiliation
While there are many physical processes showing subdiffusion and some useful particle models for understanding the underlying mechanisms have been established, a systematic study of subdiffusive energy transport is still lacking. Here we present convincing evidence that, in the range of system size investigated, the energy subdiffusion can take place in a Hamiltonian lattice system with both harmonic nearest-neighbor and anharmonic long-range interactions. In particular, we show that the interaction range dependence of antipersistent energy-current correlations are relevant to this special type of energy subdiffusion. The underlying mechanisms are related to the various scattering processes of phonons and discrete breathers. Our results shed light on understanding the extremely slow energy transport.
中文翻译:
由于声子和离散呼吸器的散射导致的次扩散能量传输和反持久相关性
虽然有许多物理过程显示出亚扩散,并且已经建立了一些有用的粒子模型来理解其潜在机制,但仍然缺乏对亚扩散能量传输的系统研究。在这里,我们提供了令人信服的证据,即在所研究的系统尺寸范围内,能量子扩散可以发生在具有谐波最近邻和非谐波长程相互作用的哈密顿晶格系统中。特别是,我们表明,反持久性能量-电流相关性的相互作用范围依赖性与这种特殊类型的能量子扩散有关。潜在机制与声子和离散呼吸器的各种散射过程有关。我们的研究结果为理解极慢的能量传输提供了启示。
更新日期:2022-09-13
中文翻译:
由于声子和离散呼吸器的散射导致的次扩散能量传输和反持久相关性
虽然有许多物理过程显示出亚扩散,并且已经建立了一些有用的粒子模型来理解其潜在机制,但仍然缺乏对亚扩散能量传输的系统研究。在这里,我们提供了令人信服的证据,即在所研究的系统尺寸范围内,能量子扩散可以发生在具有谐波最近邻和非谐波长程相互作用的哈密顿晶格系统中。特别是,我们表明,反持久性能量-电流相关性的相互作用范围依赖性与这种特殊类型的能量子扩散有关。潜在机制与声子和离散呼吸器的各种散射过程有关。我们的研究结果为理解极慢的能量传输提供了启示。