活性各向同性向列相中的稳定性、有序性和涨落的动态行为。
Live soap: stability, order, and fluctuations in apolar active smectics.
机构信息
Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India and Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany.
Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India and TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research, 21 Brundavan Colony, Narsingi, Hyderabad 500 075, India.
出版信息
Phys Rev Lett. 2013 Mar 15;110(11):118102. doi: 10.1103/PhysRevLett.110.118102.
We construct a hydrodynamic theory of noisy, apolar active smectics in bulk suspension or on a substrate. Unlike purely orientationally ordered active fluids, active apolar smectics can be dynamically stable in Stokesian bulk suspensions. Smectic order in these systems is quasilong ranged in dimension d=2 and long ranged in d=3. We predict reentrant Kosterlitz-Thouless melting to an active nematic in our simplest model in d=2, a nonzero second-sound speed parallel to the layers in bulk suspensions, and that there are no giant number fluctuations in either case. We also briefly discuss possible instabilities in these systems.
我们构建了一个关于无极性活性各向异性体在悬浊液或基底中噪声行为的流体动力学理论。与纯取向有序的活性流体不同，无极性活性各向异性体在斯托克斯悬浊液中可以是动力学稳定的。在这些体系中，在维度 d=2 时，向列序呈现准长程有序，在维度 d=3 时呈现长程有序。在我们的二维最简单模型中，我们预测到再入科斯特利茨-索利斯熔化会转变为活性向列相，在悬浊液中，平行于层的第二声速不为零，并且在这两种情况下都没有巨数涨落。我们还简要讨论了这些体系中可能存在的不稳定性。
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