Order and Fluctuations in Collective Dynamics of Swimming Bacteria

Experimental Exploration of Active Matter Physics

  • Daiki┬áNishiguchi

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xiii
  2. Daiki Nishiguchi
    Pages 1-8
  3. Daiki Nishiguchi
    Pages 9-43
  4. Daiki Nishiguchi
    Pages 45-83
  5. Daiki Nishiguchi
    Pages 85-96
  6. Daiki Nishiguchi
    Pages 123-125
  7. Back Matter
    Pages 127-128

About this book


This thesis focuses on experimental studies on collective motion using swimming bacteria as model active-matter systems. It offers comprehensive reviews of state-of-the-art theories and experiments on collective motion from the viewpoint of nonequilibrium statistical physics. The author presents his experimental studies on two major classes of collective motion that had been well studied theoretically. Firstly, swimming filamentous bacteria in a thin fluid layer are shown to exhibit true, long-range orientational order and anomalously strong giant density fluctuations, which are considered universal and landmark signatures of collective motion by many numerical and theoretical works but have never been observed in real systems. Secondly, chaotic bacterial turbulence in a three-dimensional dense suspension without any long-range order as described in the first half is demonstrated to be capable of achieving antiferromagnetic vortex order by imposing a small number of constraints with appropriate periodicity. The experimental results presented significantly advance our fundamental understanding of order and fluctuations in collective motion of motile elements and their future applications.


Physics of Active Matter Nonequilibrium Collective Motion Self-propelled Particles Vicsek Model Microswimmer Anomalously Strong Giant Number Fluctuations Chaotic Bacterial Turbulence Self-organization in Collective Motion as Active Matter

Authors and affiliations

  • Daiki┬áNishiguchi
    • 1
  1. 1.Department of Physics, Graduate School of ScienceThe University of TokyoTokyoJapan

Bibliographic information

  • DOI
  • Copyright Information Springer Nature Singapore Pte Ltd. 2020
  • Publisher Name Springer, Singapore
  • eBook Packages Physics and Astronomy
  • Print ISBN 978-981-32-9997-9
  • Online ISBN 978-981-32-9998-6
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
  • Buy this book on publisher's site
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