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DOI	10.1073/pnas.1721324115
	A random first-order transition theory for an active glass
	Nandi S.K.; Mandal R.; Bhuyan P.J.; Dasgupta C.; Rao M.; Gov N.S.
发表日期	2018
ISSN	0027-8424
起始页码	7688
结束页码	7693
卷号	115 期号:30
英文摘要	How does nonequilibrium activity modify the approach to a glass? This is an important question, since many experiments reveal the near-glassy nature of the cell interior, remodeled by activity. However, different simulations of dense assemblies of active particles, parametrized by a self-propulsion force, f0, and persistence time, τp, appear to make contradictory predictions about the influence of activity on characteristic features of glass, such as fragility. This calls for a broad conceptual framework to understand active glasses; here, we extend the random first-order transition (RFOT) theory to a dense assembly of self-propelled particles. We compute the active contribution to the configurational entropy through an effective model of a single particle in a caging potential. This simple active extension of RFOT provides excellent quantitative fits to existing simulation results. We find that whereas f0 always inhibits glassiness, the effect of τp is more subtle and depends on the microscopic details of activity. In doing so, the theory automatically resolves the apparent contradiction between the simulation models. The theory also makes several testable predictions, which we verify by both existing and new simulation data, and should be viewed as a step toward a more rigorous analytical treatment of active glass. © 2018 National Academy of Sciences. All Rights Reserved.
英文关键词	Active glass; Active RFOT; Dense self-propelled particle system; Fragility; Persistence time
语种	英语
scopus关键词	active glass; Article; cell activity; cell granule; controlled study; entropy; glass transition temperature; karyotype; microscopy; molecular dynamics; osmotic fragility; prediction; priority journal; process model; protein assembly; random first-order transition theory; simulation
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160488
作者单位	Nandi, S.K., Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel; Mandal, R., Department of Physics, Indian Institute ofScience, Bangalore, 560012, India, Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of FundamentalResearch, Bangalore, 560065, India; Bhuyan, P.J., Department of Physics, Indian Institute ofScience, Bangalore, 560012, India; Dasgupta, C., Department of Physics, Indian Institute ofScience, Bangalore, 560012, India, Statistical Physics and Condensed Matter Group, International Centre for Theoretical Sciences, Bangalore, 560089, India; Rao, M., Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of FundamentalResearch, Bangalore, 560065, India; Gov, N.S., Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 7610001, Israel
推荐引用方式 GB/T 7714	Nandi S.K.,Mandal R.,Bhuyan P.J.,et al. A random first-order transition theory for an active glass[J],2018,115(30).
APA	Nandi S.K.,Mandal R.,Bhuyan P.J.,Dasgupta C.,Rao M.,&Gov N.S..(2018).A random first-order transition theory for an active glass.Proceedings of the National Academy of Sciences of the United States of America,115(30).
MLA	Nandi S.K.,et al."A random first-order transition theory for an active glass".Proceedings of the National Academy of Sciences of the United States of America 115.30(2018).