Journal
PHYSICAL REVIEW E
Volume 95, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.95.020601
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Funding
- MEXT, Japan [25103004, 26610112]
- JSPS
- French ANR project Bactterns
- [26-9915]
- Grants-in-Aid for Scientific Research [14J09915, 26610112, 25103004, 15K21724] Funding Source: KAKEN
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We study the collective dynamics of elongated swimmers in a very thin fluid layer by devising long filamentous nontumbling bacteria. The strong confinement induces weak nematic alignment upon collision, which, for large enough density of cells, gives rise to global nematic order. This homogeneous but fluctuating phase, observed on the largest experimentally accessible scale of millimeters, exhibits the properties predicted by standard models for flocking, such as the Vicsek-style model of polar particles with nematic alignment: true long-range nematic order and nontrivial giant number fluctuations.
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