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Swimming in circles can lead to exotic hyperuniform states of active living matter [Physics]
Proceedings of the National Academy of Sciences of the United States of America ( IF 9.412 ) Pub Date : 2021-06-15 , DOI: 10.1073/pnas.2107276118
Salvatore Torquato

The study of hyperuniform states of matter is an emerging multidisciplinary field, influencing and linking developments across the physical sciences, mathematics, and biology (1, 2). A hyperuniform many-particle system in d-dimensional Euclidean space is characterized by an anomalous suppression of large-scale density fluctuations relative to those in typical disordered systems, such as liquids and amorphous solids. As such, the hyperuniformity concept generalizes the traditional notion of long-range order to include not only all perfect crystals and quasicrystals but also exotic disordered states of matter. Disordered hyperuniform states have attracted great attention across many fields over the last two decades because they can have the character of crystals on large length scales but are isotropic like liquids (2). This hybrid crystal–liquid attribute endows them with unique or nearly optimal, direction-independent physical properties and robustness against defects (314). Adding to this flurry of research activity is the finding by Huang et al. (15) that circularly swimming marine algae can robustly self-organize into disordered hyperuniform states through long-range hydrodynamic interactions at air–liquid interfaces.

中文翻译:

绕圈游泳会导致活跃生物的奇异超均匀状态 [物理学]

超均匀物质状态的研究是一个新兴的多学科领域,影响和联系了物理科学、数学和生物学的发展 ( 1 , 2)。d 维欧几里得空间中的超均匀多粒子系统的特征是对大尺度密度波动的异常抑制,相对于典型的无序系统(如液体和无定形固体)。因此,超均匀性概念概括了长程有序的传统概念,不仅包括所有完美的晶体和准晶体,还包括奇异的无序物质状态。在过去的二十年里,无序超均匀态在许多领域引起了极大的关注,因为它们可以在大长度尺度上具有晶体的特征,但又像液体一样是各向同性的 ( 2 )。这种混合晶体-液体属性赋予它们独特的或接近最佳的、与方向无关的物理特性和对缺陷的鲁棒性(314)。Huang等人的发现增加了这一系列的研究活动。( 15 ) 循环游动的海藻可以通过气-液界面的长程流体动力学相互作用稳健地自组织成无序的超均匀状态。
更新日期:2021-06-08
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