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Theoretical physicists working at a blackboard collaboration pod in the Beecroft building.
Credit: Jack Hobhouse

Julia Yeomans OBE FRS

Professor of Physics

Research theme

  • Biological physics

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Condensed Matter Theory
Julia.Yeomans@physics.ox.ac.uk
Telephone: 01865 (2)76884 (college),01865 (2)73992
Rudolf Peierls Centre for Theoretical Physics, room 70.10
www-thphys.physics.ox.ac.uk/people/JuliaYeomans
  • About
  • Publications

Nature of active forces in tissues: how contractile cells can form extensile monolayers

Authors:

Lakshmi Balasubramaniam, Amin Doostmohammadi, Thuan Beng Saw, Gautham Hari Narayana Sankara Narayana, Romain Mueller, Tien Dang, Minnah Thomas, Shafali Gupta, Surabhi Sonam, Alpha S Yap, Yusuke Toyama, René-Marc Mège, Julia Yeomans, Benoît Ladoux
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Reconfigurable Flows and Defect Landscape of Confined Active Nematics

Communications Physics Nature Research (part of Springer Nature)

Authors:

Jérôme Hardoüin, Rian Hughes, Amin Doostmohammadi, Justine Laurent, Teresa Lopez-Leon, Julia M Yeomans, Jordi Ignés-Mullol, Francesc Sagués

Abstract:

Using novel micro-printing techniques, we develop a versatile experimental setup that allows us to study how lateral confinement tames the active flows and defect properties of the microtubule/kinesin active nematic system. We demonstrate that the active length scale that determines the self-organization of this system in unconstrained geometries loses its relevance under strong lateral confinement. Dramatic transitions are observed from chaotic to vortex lattices and defect-free unidirectional flows. Defects, which determine the active flow behavior, are created and annihilated on the channel walls rather than in the bulk, and acquire a strong orientational order in narrow channels. Their nucleation is governed by an instability whose wavelength is effectively screened by the channel width. All these results are recovered in simulations, and the comparison highlights the role of boundary conditions.
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Self organisation of invasive breast cancer driven by the interplay of active and passive nematic dynamics

Authors:

Pablo Gottheil, Saraswat Bhattacharyya, Kolya Lettl, Philip Friedrich, Kilian Roth, Salvador Rivera-Moreno, Mario Merkel, Bahriye Aktas, Igor Sauer, Assal Daneshgar, Jonas Wieland, Hans Kubitschke, Anne-Sophie Wegscheider, Julia M Yeomans, Josef A Käs
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Symmetry-breaking in drop bouncing on curved surfaces

Nature Communications Nature Publishing Group: Nature Communications

Authors:

JM Yeomans, M Andrew
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The 2019 Motile Active Matter Roadmap

Journal of Physics: Condensed Matter IOP Publishing

Authors:

Gerhard Gompper, Roland G Winkler, Thomas Speck, Alexandre Solon, Cesare Nardini, Fernando Peruani, Hartmut Loewen, Ramin Golestanian, U Benjamin Kaupp, Luis Alvarez, Thomas Kioerboe, Eric Lauga, Wilson Poon, Antonio De Simone, Frank Cichos, Alexander Fischer, Santiago Muinos Landin, Nicola Soeker, Raymond Kapral, Pierre Gaspard, Marisol Ripoll, Francesc Sagues, Julia Yeomans, Amin Doostmohammadi, Igor Aronson, Clemens Bechinger, Holger Stark, Charlotte Hemelrijk, Francois Nedelec, Trinish Sarkar, Thibault Aryaksama, Mathilde Lacroix, Guillaume Duclos, Victor Yashunsky, Pascal Silberzan, Marino Arroyo, Sohan Kale

Abstract:

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.
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