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Computing and Understanding Collective Action (CUCA) Lab.

@cuca-lab.bsky.social
106 followers 164 following 11 posts

We try to decipher how order and function build up in complex systems. Mostly deploying the statistical physics toolkit, combining theory, numerical simulations and experiments of model systems. @ Faculty of Physics @ub.edu + @ubics.bsky.social

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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 25/03/2026
👉 How does non-reciprocity reshape the dynamics of the O(2)-2dXY model? it controls trajectories & stability of excitations, described by a Burgers eq. A step towards pattern control in active matter. By YRouzaire with DPearce IPagonabarraga @demianlevis.bsky.social arxiv.org/abs/2603.23225
arxiv.org
Dynamics of O(2) excitations in a non-reciprocal medium
We investigate emergent dynamics due to non-reciprocity in the $\mathcal{O}(2)$ model. The lattice XY model, where non-reciprocity stems from vision cone like couplings, can be described by a continuu...
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 18/02/2026
EU DN "A Coherent Analysis Framework for Emergence in Biological Systems" (CAFE-BIO) is recruiting 15 PhDs in 12 institutions eg @ubics.bsky.social @ub.edu. #statphys for #bio and #complex problems. Gain international experience with academic and industry secondments. more info: cafe-bio.org
cafe-bio.org
CAFE-BIO
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 15/12/2025
Our first experimental paper has just been published 🥳! We show that motorized toys are a great experimental model system to study chiral #activematter. Exact calculations reproducing experimental results with no fitting parameter @ubics.bsky.social journals.aps.org/pre/abstract...
journals.aps.org
Depinning and activated motion of chiral self-propelled particles
We study experimentally, numerically, and analytically, the dynamics of a chiral active particle (cm-sized robots), pulled at a constant translational velocity. We show that these robots can faithfull...
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 02/12/2025
👉New preprint on avalanches in active glasses with finite persistence time. Universal behaviour of avalanches triggered by activity vs. triggered by shear: self-propulsion modulates the size of plastic events. With @ezeferrero.bsky.social #RWiese @demianlevis.bsky.social @ubics.bsky.social
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 19/06/2025
Very excited to see this work out! Mixtures of active colloids, clustering, de-mixing, collective dynamics and all that. Great experiments by @lauraal.bsky.social with Lucio Isa @ethz.ch Elena Sesé and Ignacio Pagonabarraga #activematter #softmatter --> arxiv.org/abs/2506.15188
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Reposted by Computing and Understanding Collective Action (CUCA) Lab.
Unitat de Cultura Científica i Innovació de la UB @ubdivulga.bsky.social · 16/05/2025
Hi ha ordre a la natura? 🍃 Si és així, quin és aquest ordre i com es manifesta? Ho descobrirem a la #FestaCiènciaUB amb l’ajuda de joguines robòtiques 🤖 web.ub.edu/ca/web/laubd... @cuca-lab.bsky.social @ubics.bsky.social
web.ub.edu
Com s'organitza el món? - La UB Divulga - UB
Taller de la XI Festa de la Ciència de la Universitat de Barcelona.
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 08/05/2025
🚨 New paper out in #JSTAT : non-reciprocal Ising spins: 🧲 "Vision-cone" interactions (no multi-species) 🔥 1st & 2nd order phase transitions 🌀 Anisotropic coarsening PhDwork of AGarces @demianlevis.bsky.social @ubics.bsky.social @ub.edu iopscience.iop.org/article/10.1... #StatMech #ComplexSystems
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 07/05/2025
🚨 New paper in PRL: journals.aps.org/prl/abstract... -> motion induces a topological phase transition in 2D systems of Kuramoto oscillators with random frequencies 🌀 w YRouzaire PRahmani FPeruani IPgagonabarraga @demianlevis.bsky.social @ubics.bsky.social @ub.edu #ComplexSystems #ActiveMatter
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 24/04/2025
Published in #PhysRevLett! How nonreciprocity affects the behaviour of topological defects? they are reshaped, their annihilation can be enhanced or hindered, +1 -1 charges move differently. PhD work of YRouzaire @ub.edu @ubics.bsky.social with @demianlevis.bsky.social IPagonabarraga and DPearce.
journals.aps.org
Nonreciprocal Interactions Reshape Topological Defect Annihilation
We show how nonreciprocal ferromagnetic interactions between neighboring planar spins in two dimensions, affect the behavior of topological defects. Nonreciprocity is introduced by weighting the coupl...
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Reposted by Computing and Understanding Collective Action (CUCA) Lab.
Demian Levis @demianlevis.bsky.social · 15/04/2025
What a great week! The 1st Barcelona School on non-equilibrium stat phys has been really successful. Thanks to C Calero, F Ritort, the students and all attendees sponsors and mostly, our 5 Lecturers. #statphys #bcnschoolneqstatphys
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 26/02/2025
Congratulations to Mehran Kardar and Yoshiki Kuramoto, 2025 Boltzmann medalists! 🥳
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Computing and Understanding Collective Action (CUCA) Lab. @cuca-lab.bsky.social · 07/02/2025
The first paper of the Lab is on the cover of Soft Matter! @softmatter-journal.bsky.social pubs.rsc.org/en/Content/A... Collective motion of particles with an energy depot JPMIranda @demianlevis.bsky.social and @chantalvaleriani.bsky.social. #activematter #statmech
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Reposted by Computing and Understanding Collective Action (CUCA) Lab.
Rodrigo Rojo @rojo.me · 04/02/2025
Está BRUTAL esta nueva técnica de ByteDance (los de TikTok) 😱 Se trata de Omnihuman-1, una IA multimodal que soporta imagen, video y audio, y la gracia es que permite crear videos de personas en cualquier relación de aspecto, y en cualquier proporción del humano (ej: cuerpo completo, retrato, etc)
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