Ferromagnetic and antiferromagnetic order in bacterial vortex lattices
Despite their inherently non-equilibrium nature [1] , living systems can self-organize in highly ordered collective states [2,3] that share striking similarities with the thermodynamic equilibrium phases [4,5] of conventional condensed-matter and fluid systems. Examples range from the liquid-crystal...
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| Autores principales: | , , , |
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| Lenguaje: | inglés |
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Nature Publishing Group
2019
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| Acceso en línea: | https://demo7.dspace.org/handle/123456789/436 |
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| _version_ | 1860822454963798016 |
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| author | Wioland, Hugo Woodhouse, Francis Gordon Dunkel, Jörn Goldstein, Raymond |
| author_browse | Dunkel, Jörn Goldstein, Raymond Wioland, Hugo Woodhouse, Francis Gordon |
| author_facet | Wioland, Hugo Woodhouse, Francis Gordon Dunkel, Jörn Goldstein, Raymond |
| author_sort | Wioland, Hugo |
| collection | DSpace |
| description | Despite their inherently non-equilibrium nature [1] , living systems can self-organize in highly ordered collective states [2,3] that share striking similarities with the thermodynamic equilibrium phases [4,5] of conventional condensed-matter and fluid systems. Examples range from the liquid-crystal-like arrangements of bacterial colonies [6,7], microbial suspensions [8,9] and tissues [10] to the coherent macro-scale dynamics in schools of fish [11] and flocks of birds [12]. Yet, the generic mathematical principles that govern the emergence of structure in such artificial [13] and biological [6-9,14] systems are elusive. It is not clear when, or even whether, well-established theoretical concepts describing universal thermostatistics of equilibrium systems can capture and classify ordered states of living matter. Here, we connect these two previously disparate regimes: through microfluidic experiments and mathematical modelling, we demonstrate that lattices of hydrodynamically coupled bacterial vortices can spontaneously organize into distinct patterns characterized by ferro- and antiferromagnetic order. The coupling between adjacent vortices can be controlled by tuning the inter-cavity gap widths. The emergence of opposing order regimes is tightly linked to the existence of geometry-induced edge currents [15,16], reminiscent of those in quantum systems [17-19]. Our experimental observations can be rationalized in terms of a generic lattice field theory, suggesting that bacterial spin networks belong to the same universality class as a wide range of equilibrium systems. |
| id | oai:localhost:123456789-436 |
| institution | DSPACE.FCHPT |
| language | English |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Nature Publishing Group |
| publisherStr | Nature Publishing Group |
| record_format | dspace |
| spelling | oai:localhost:123456789-4362021-04-07T16:30:11Z Ferromagnetic and antiferromagnetic order in bacterial vortex lattices Wioland, Hugo Woodhouse, Francis Gordon Dunkel, Jörn Goldstein, Raymond Despite their inherently non-equilibrium nature [1] , living systems can self-organize in highly ordered collective states [2,3] that share striking similarities with the thermodynamic equilibrium phases [4,5] of conventional condensed-matter and fluid systems. Examples range from the liquid-crystal-like arrangements of bacterial colonies [6,7], microbial suspensions [8,9] and tissues [10] to the coherent macro-scale dynamics in schools of fish [11] and flocks of birds [12]. Yet, the generic mathematical principles that govern the emergence of structure in such artificial [13] and biological [6-9,14] systems are elusive. It is not clear when, or even whether, well-established theoretical concepts describing universal thermostatistics of equilibrium systems can capture and classify ordered states of living matter. Here, we connect these two previously disparate regimes: through microfluidic experiments and mathematical modelling, we demonstrate that lattices of hydrodynamically coupled bacterial vortices can spontaneously organize into distinct patterns characterized by ferro- and antiferromagnetic order. The coupling between adjacent vortices can be controlled by tuning the inter-cavity gap widths. The emergence of opposing order regimes is tightly linked to the existence of geometry-induced edge currents [15,16], reminiscent of those in quantum systems [17-19]. Our experimental observations can be rationalized in terms of a generic lattice field theory, suggesting that bacterial spin networks belong to the same universality class as a wide range of equilibrium systems. 2019-04-26T08:56:55Z 2019-04-26T08:56:55Z 04/01/16 https://demo7.dspace.org/handle/123456789/436 en Nature Publishing Group |
| spellingShingle | Wioland, Hugo Woodhouse, Francis Gordon Dunkel, Jörn Goldstein, Raymond Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title | Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title_full | Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title_fullStr | Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title_full_unstemmed | Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title_short | Ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| title_sort | ferromagnetic and antiferromagnetic order in bacterial vortex lattices |
| url | https://demo7.dspace.org/handle/123456789/436 |
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