Emergent smectic order in simple active particle models
Novel ‘smectic-P’ behavior, in which self-propelled particles form rows and move on average along them, occurs generically within the orientationally ordered phase of simple models that we simulate. Both apolar (head–tail symmetric) and polar (head–tail asymmetric) models with aligning and repulsive...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/18/6/063015 |
| _version_ | 1797750985598173184 |
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| author | Pawel Romanczuk Hugues Chaté Leiming Chen Sandrine Ngo John Toner |
| author_facet | Pawel Romanczuk Hugues Chaté Leiming Chen Sandrine Ngo John Toner |
| author_sort | Pawel Romanczuk |
| collection | DOAJ |
| description | Novel ‘smectic-P’ behavior, in which self-propelled particles form rows and move on average along them, occurs generically within the orientationally ordered phase of simple models that we simulate. Both apolar (head–tail symmetric) and polar (head–tail asymmetric) models with aligning and repulsive interactions exhibit slow algebraic decay of smectic order with system size up to some finite length scale, after which faster decay occurs. In the apolar case, this scale is that of an undulation instability of the rows. In the polar case, this instability is absent, but traveling fluctuations disrupt the rows in large systems and motion and smectic order may spontaneously globally rotate. These observations agree with a new hydrodynamic theory which we present here. Variants of our models also exhibit active smectic ‘A’ and ‘C’ order, with motion orthogonal and oblique to the layers respectively. |
| first_indexed | 2024-03-12T16:40:48Z |
| format | Article |
| id | doaj.art-c1aaca1bfa7a4789aaa9d69c1e32a051 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:40:48Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-c1aaca1bfa7a4789aaa9d69c1e32a0512023-08-08T14:31:15ZengIOP PublishingNew Journal of Physics1367-26302016-01-0118606301510.1088/1367-2630/18/6/063015Emergent smectic order in simple active particle modelsPawel Romanczuk0Hugues Chaté1Leiming Chen2Sandrine Ngo3John Toner4Max Planck Institute for the Physics of Complex Systems , Nöthnitzerstr. 38, D-01187 Dresden, Germany; Faculty of Life Sciences, Humboldt Universität zu Berlin , D-10099 Berlin, GermanyMax Planck Institute for the Physics of Complex Systems , Nöthnitzerstr. 38, D-01187 Dresden, Germany; Service de Physique de l’Etat Condensé , CEA-Saclay, CNRS UMR 3680, F-91191 Gif-sur-Yvette, France; Beijing Computational Science Research Center , Beijing 100094, People's Republic of ChinaMax Planck Institute for the Physics of Complex Systems , Nöthnitzerstr. 38, D-01187 Dresden, Germany; College of Science, China University of Mining and Technology , Xuzhou, Jiangsu, 221116, People's Republic of ChinaMax Planck Institute for the Physics of Complex Systems , Nöthnitzerstr. 38, D-01187 Dresden, Germany; Service de Physique de l’Etat Condensé , CEA-Saclay, CNRS UMR 3680, F-91191 Gif-sur-Yvette, FranceMax Planck Institute for the Physics of Complex Systems , Nöthnitzerstr. 38, D-01187 Dresden, Germany; Department of Physics and Institute for Theoretical Science, University of Oregon , Eugene, OR 97403, USANovel ‘smectic-P’ behavior, in which self-propelled particles form rows and move on average along them, occurs generically within the orientationally ordered phase of simple models that we simulate. Both apolar (head–tail symmetric) and polar (head–tail asymmetric) models with aligning and repulsive interactions exhibit slow algebraic decay of smectic order with system size up to some finite length scale, after which faster decay occurs. In the apolar case, this scale is that of an undulation instability of the rows. In the polar case, this instability is absent, but traveling fluctuations disrupt the rows in large systems and motion and smectic order may spontaneously globally rotate. These observations agree with a new hydrodynamic theory which we present here. Variants of our models also exhibit active smectic ‘A’ and ‘C’ order, with motion orthogonal and oblique to the layers respectively.https://doi.org/10.1088/1367-2630/18/6/063015active mattersmecticself-propelled particlespattern formationalignmenthydrodynamic theory |
| spellingShingle | Pawel Romanczuk Hugues Chaté Leiming Chen Sandrine Ngo John Toner Emergent smectic order in simple active particle models New Journal of Physics active matter smectic self-propelled particles pattern formation alignment hydrodynamic theory |
| title | Emergent smectic order in simple active particle models |
| title_full | Emergent smectic order in simple active particle models |
| title_fullStr | Emergent smectic order in simple active particle models |
| title_full_unstemmed | Emergent smectic order in simple active particle models |
| title_short | Emergent smectic order in simple active particle models |
| title_sort | emergent smectic order in simple active particle models |
| topic | active matter smectic self-propelled particles pattern formation alignment hydrodynamic theory |
| url | https://doi.org/10.1088/1367-2630/18/6/063015 |
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