The 2020 motile active matter roadmap

Gerhard Gompper*, Roland G Winkler, Thomas Speck, Alexandre Solon, Cesare Nardini, Fernando Peruani, Hartmut Löwen, Ramin Golestanian, U Benjamin Kaupp, Luis Alvarez, Thomas Kiørboe, Eric Lauga, Wilson C K Poon, Antonio DeSimone, Santiago Muiños-Landin, Alexander Fischer, Nicola A Söker, Frank Cichos, Raymond Kapral, Pierre GaspardMarisol Ripoll, Francesc Sagues, Amin Doostmohammadi, Julia M Yeomans, Igor S Aranson, Clemens Bechinger, Holger Stark, Charlotte K Hemelrijk, François J Nedelec, Trinish Sarkar, Thibault Aryaksama, Mathilde Lacroix, Guillaume Duclos, Victor Yashunsky, Pascal Silberzan, Marino Arroyo, Sohan Kale

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Activity and autonomous motion are fundamental in living and engineering systems. This has stimulated the new field of 'active matter' in recent years, which focuses on the physical aspects of propulsion mechanisms, and on motility-induced emergent collective behavior of a larger number of identical agents. The scale of agents ranges from nanomotors and microswimmers, to cells, fish, birds, and people. Inspired by biological microswimmers, various designs of autonomous synthetic nano- and micromachines have been proposed. Such machines provide the basis for multifunctional, highly responsive, intelligent (artificial) active materials, which exhibit emergent behavior and the ability to perform tasks in response to external stimuli. A major challenge for understanding and designing active matter is their inherent nonequilibrium nature due to persistent energy consumption, which invalidates equilibrium concepts such as free energy, detailed balance, and time-reversal symmetry. Unraveling, predicting, and controlling the behavior of active matter is a truly interdisciplinary endeavor at the interface of biology, chemistry, ecology, engineering, mathematics, and physics.
The vast complexity of phenomena and mechanisms involved in the self-organization and dynamics of motile active matter comprises a major challenge. Hence, to advance, and eventually reach a comprehensive understanding, this important research area requires a concerted, synergetic approach of the various disciplines. The 2020 motile active matter roadmap of Journal of Physics: Condensed Matter addresses the current state of the art of the field and provides guidance for both students as well as established scientists in their efforts to advance this fascinating area.
Original languageEnglish
Article number193001
JournalJournal of Physics Condensed Matter
Issue number19
Publication statusPublished - 2020


  • Nanomachines
  • Microswimmers
  • Cells
  • Tissues
  • Non-equilibrium systems
  • Hydrodynamics
  • Collective behavior


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