Noise-Induced Phase Separation and Time Reversal Symmetry Breaking in Active Field Theories Driven by Persistent Noise,Physical Review Letters

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Noise-Induced Phase Separation and Time Reversal Symmetry Breaking in Active Field Theories Driven by Persistent Noise
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-09-12 , DOI: 10.1103/physrevlett.133.118301
Matteo Paoluzzi _{1,

2} , Demian Levis _{3,

4} , Andrea Crisanti ₂ , Ignacio Pagonabarraga _{3,

4}

Affiliation

Within the Landau-Ginzburg picture of phase transitions, scalar field theories develop phase separation because of a spontaneous symmetry-breaking mechanism. This picture works in thermodynamics but also in the dynamics of phase separation. Here we show that scalar nonequilibrium field theories undergo phase separation just because of nonequilibrium fluctuations driven by a persistent noise. The mechanism is similar to what happens in motility-induced phase separation where persistent motion introduces an effective attractive force. We observe that noise-induced phase separation occurs in a region of the phase diagram where disordered field configurations would otherwise be stable at equilibrium. Measuring the local entropy production rate to quantify the time-reversal symmetry breaking, we find that such breaking is concentrated on the boundary between the two phases.

中文翻译：

持续噪声驱动的有源场论中噪声引起的相分离和时间反演对称性破缺

在相变的朗道-金兹堡图中，标量场理论由于自发对称破缺机制而发展出相分离。这张图片适用于热力学，也适用于相分离动力学。在这里，我们证明标量非平衡场论仅仅因为持续噪声驱动的非平衡涨落而发生相分离。该机制类似于运动引起的相分离中发生的情况，其中持续运动引入了有效的吸引力。我们观察到，噪声引起的相分离发生在相图的某个区域中，否则无序场配置将在平衡状态下保持稳定。通过测量局部熵产生率来量化时间反演对称性破缺，我们发现这种破缺集中在两相之间的边界上。

更新日期：2024-09-12

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