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X-ORIGINAL-URL:https://www.lps.u-psud.fr/
X-WR-CALNAME:Laboratoire de physique des Solides
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DTSTART;TZID=Europe/Paris:20261020T140000
DTEND;TZID=Europe/Paris:20261020T180000
DTSTAMP:20261019T084200
UID:MEC-c96e651946818e0787d6296f69549fe1@lps.u-psud.fr
CREATED:20261019
LAST-MODIFIED:20261019
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Raphaël MAIRE : Topology from Noise in Chiral Active Matter
DESCRIPTION:\nIn classical systems, topology is typically associated with the deterministic dynamics of a system. Topological waves in fluids or metamaterials, for instance, arise from deterministic time evolution, with fluctuations playing only a secondary role. In this talk, however, we will show that observables related to fluctuations can carry a nontrivial band topology, even when both the deterministic dynamics and the fluctuating forcing are Chern-trivial.\n\n\n\nWe take chiral active particles on a lattice as an example and study their displacement spectrum. We find that this spectrum has topologically nontrivial bands due to a mechanism reminiscent of the one underlying topology in Haldane’s model. We then show how this topology leads to the robust localization of fluctuation modes at boundaries.\n\n\n\nPaper: https://arxiv.org/abs/2608.26055\n
URL:https://www.lps.u-psud.fr/en/events/raphael-maire-topology-from-noise-in-chiral-active-matter/
CATEGORIES:Condensed Matter Theory Seminar,Seminars
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