随机组织超均匀态的时空关联活性调控
Spatiotemporally correlated activity regulation of random-organizing hyperuniform states
AI总结：
该研究针对质心守恒是否足以实现超均匀性的问题，通过粒子模拟和线性涨落理论，发现时空关联活性调控可在保留质心守恒的同时破坏超均匀性，阐明了质心守恒的局限性，强调了活性关联控制的重要性。
摘要：
质心（COM）守恒被广泛认为是产生具有消失长波长密度涨落的非平衡动态超均匀态的重要机制，但它是否足以实现超均匀性仍不清楚。本文通过粒子模拟和线性涨落理论表明，时空关联活性调控可在保留质心守恒的同时破坏超均匀性。我们构建了一种二元混合物，其中独立演化的驱动粒子的局域密度，遵循质心守恒的有偏随机组织调控被调控粒子的活性。这一反例表明，超均匀性不仅取决于粒子位移的守恒定律，还取决于活性的时空关联。我们的发现阐明了质心守恒作为实现超均匀性途径的局限性，并强调了在设计非平衡多超均匀混合物时控制活性关联的重要性。
英文摘要：
Center-of-mass (COM) conservation has been widely accepted as an important mechanism for generating nonequilibrium dynamic hyperuniform states with vanishing long-wavelength density fluctuations, but whether it is sufficient for hyperuniformity remains unclear. Here, using particle simulations and a linear fluctuating theory, we show that spatiotemporally correlated activity regulation can destroy hyperuniformity while preserving COM conservation. We construct a binary mixture in which the local density of independently evolving driver particles regulates the activity of regulated particles following COM-conserving biased random organization. This counterexample demonstrates that hyperuniformity depends on the spatial and temporal correlations of activity as well as the conservation laws governing particle displacements. Our findings clarify the limits of COM conservation as a route to hyperuniformity and highlight the importance of controlling activity correlations in the design of nonequilibrium multihyperuniform mixtures.
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