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Title: Nonequilibrium strongly hyperuniform fluids of circle active particles with large local density fluctuations
Authors: Lei, Qun-Li
Ciamarra, Massimo Pica
Ni, Ran
Keywords: DRNTU::Engineering::Chemical engineering
Mean Field Theory
Microphase Separation
Issue Date: 2019
Source: Lei, Q.- L., Ciamarra, M. P., & Ni, R. (2019). Nonequilibrium strongly hyperuniform fluids of circle active particles with large local density fluctuations. Science Advances, 5(1), eaau7423-. doi:10.1126/sciadv.aau7423
Series/Report no.: Science Advances
Abstract: Disordered hyperuniform structures are an exotic state of matter having vanishing long-wavelength density fluctuations similar to perfect crystals but without long-range order. Although its importance in materials science has been brought to the fore in past decades, the rational design of experimentally realizable disordered strongly hyperuniform microstructures remains challenging. Here we find a new type of nonequilibrium fluid with strong hyperuniformity in two-dimensional systems of chiral active particles, where particles perform independent circular motions of the radius R with the same handedness. This new hyperuniform fluid features a special length scale, i.e., the diameter of the circular trajectory of particles, below which large density fluctuations are observed. By developing a dynamic mean-field theory, we show that the large local density fluctuations can be explained as a motility-induced microphase separation, while the Fickian diffusion at large length scales and local center-of-mass-conserved noises are responsible for the global hyperuniformity.
DOI: 10.1126/sciadv.aau7423
Schools: School of Chemical and Biomedical Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles
SPMS Journal Articles

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