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在具有非相互相互作用的非极性混合物中出现的极性顺序
Giulia Pisegna1, Suropriya Saha1, Ramin Golestanian1,2
1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Göttingen 37077, Germany.
概括
具有非相互相互作用的活性物质系统在2D及以上呈现出远程极性秩序. 这种新兴的秩序,稳定在尺度非互惠的混合物中,违反了Mermin-Wagner定理.
科学领域:
- 复杂的物理系统复杂的物理系统.
- 活动物质物理学 活动物质物理学
- 统计力学就是统计力学.
背景情况:
- 现象学规则预测基于对称性和保存定律的复杂系统中的集体行为.
- 在复合单位中出现的对称性可以导致新的现象学.
- 活性物质系统通常会由于对称性约束而表现出短距离的顺序,例如默明-瓦格纳定理.
研究的目的:
- 研究具有非互惠相互作用的活性物质系统的集体行为.
- 为了证明这种系统中真正的远程极地秩序的出现.
- 将新兴的有效场理论的普遍性类别进行分类.
主要方法:
- 研究了一类具有非互惠相互作用的活性物质系统的通用类.
- 使用极性顺序参数将标量活性混合物理论映射到Toner-Tu理论.
- 包括重新规范化组意义上的所有相关非线性.
- 在有效场理论中分析软模式和非线性术语.
主要成果:
- 证明了两个维度及以上真正的远程极地秩序.
- 确定了完整的有效场理论属于 (伯格斯-) 卡达尔-帕里西-张的普遍性类.
- 证明了在标尺非互惠混合物中出现的极地长距离秩序的稳定性.
- 显示了默明-瓦格纳定理的明确违反.
结论:
- 活性物质的非互动相互作用可以导致出现远距离的极性秩序,挑战传统的对称性约束.
- 该系统的有效场理论属于 (Burgers-) 卡达尔-帕里西-张的普遍性类,证实了这个顺序的稳定性.
- 这项工作为活体物质的集体行为建立了新的范式,挑战了已有的定理.
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