Tobias Galla (also on BlueSky)
@tobiasgalla
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Theoretical physicist (statistical mechanics, complex systems), @IFISC_mallorca. Views are my own. Reproductive success n=3 🙋🏼🧏🏻♀️💁🏻♂️.
Joined January 2011
...provide an analysis of details of the implementation. We compare the accuracy & efficiency of both methods for different examples. Iterative algorithm is the better choice for problems with simple boundaries, Monte Carlo method better for problems with complex boundaries.
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Numerical methods for quasi-stationary distributions https://t.co/cR5ihC9fDL (with Sara Oliver-Bonafoux, Javi Aguilar, Raúl Toral). We discuss an iterative method to obtain QSDs of stochastic processes with absorbing states, and a Monte Carlo scheme with resetting. We ...
arxiv.org
In stochastic processes with absorbing states, the quasi-stationary distribution provides valuable insights into the long-term behaviour prior to absorption. In this work, we revisit two...
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provide an analysis of details of the implementation. We also compare the accuracy and efficiency of both methods for different examples. Iterative algorithm is the better choice for problems with simple boundaries, Monte Carlo method better for problems with complex boundaries.
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"Opinion dynamics: Statistical physics and beyond" https://t.co/6tDWsWUD16 Review of lab experiments, data, models, analytical/computational tools. 93 pages, >1k references. With @ftw_baumann, @dgarcia_eu, @iniguezg, @MartonKarsai, @jalorenz, K. Sznajd-Weron. Led by @m_starnini
arxiv.org
Opinion dynamics, the study of how individual beliefs and collective public opinion evolve, is a fertile domain for applying statistical physics to complex social phenomena. Like physical systems,...
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allows us to analytically calculate the power spectrum of oscillations. We explore when these approximations break down and provide recommendations for their use.
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We describe multiple levels of approximation (rate eps, piecewise-deterministic processes, SDEs), and show that the chemical Langevin equation can include a noise representing transcriptional bursting. This decreases computation times and >>>
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Efficient approximations of transcriptional bursting effects on the dynamics of a gene regulatory network https://t.co/cU5GLiYzsA (w @JochenKursawe, Antoine Moneyron) Transcriptional bursting induces oscillations otherwise not present, or magnifies existing oscillations. >>>
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4 postdoc positions in complex systems at IFISC, Palma de Mallorca (@IFISC_mallorca). Call open until 20/10/25, but positions may be filled starting immediately. If interested, please apply now. Candidates must be EU citizens.
📢 IFISC (UIB-CSIC) in Mallorca is offering up to 4 postdoctoral positions in complex systems science! 🔍 Topics: social systems, unconventional computing, life & environment. 📅 Deadline: 20/10/2025 🔗 Details: https://t.co/K2zj1kcfbK
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Breaking co-existence: zealotry vs nonlinear social impact (with Chris Kitching, @L_S_Ramirez, Maxi San Miguel) https://t.co/vYOAfha8xx Strong zealotry enforces consensus in voter models and evolutionary games. We show that nonlinear social impact can prevent this.
arxiv.org
We study how zealotry and nonlinear social impact affect consensus formation in the nonlinear voter model, evolutionary games, and the partisan voter model. In all three models, consensus is an...
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Interested in scientific research in the field of #ComplexSystems? 🏄♂️ 📣 IFISC announces the SURF@IFISC 2025 summer research grants for undergraduates with the aim of introducing student fellows to cutting-edge research. 📅 Deadline: 13/04 🔗 https://t.co/m5t3qnPWGc
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📣 IFISC is offering 4 scholarships for students enrolling in the Master in Physics of Complex Systems at UIB for the 25-26 academic year. One of the grants is sponsored by @F_Sicomoro ℹ https://t.co/d629pY2JNs Learn about the master's degree: ▶
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📣 IFISC is offering four scholarships for students enrolling in the Master in Physics of Complex Systems at UIB for the 25-26 academic year. One of the grants is sponsored by @F_Sicomoro. 🔗 https://t.co/d629pY2JNs
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"Proliferating active disks with game dynamical interaction" (with A. Almodóvar, C. López) https://t.co/pI81vGcR8J Self-population enhances mixing in coexistence games, speeds up extinction in coordination games, and reduces the invasion probability of a beneficial mutant.
arxiv.org
We study a system of self-propelled, proliferating finite-size disks with game-theoretical interactions, where growth rates depend on local population composition. We analyze how these...
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Predictability of temporal network dynamics in normal ageing and brain pathology (preprint with @_CaligiuriLisa_ ,@wetuad, @DrMZanin and others) https://t.co/F82VwFb6FA
arxiv.org
Spontaneous brain activity generically displays transient spatiotemporal coherent structures, which can selectively be affected in various neurological and psychiatric pathologies. Here we model...
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<< opinions are present in the population. We show that there is a phase in which the system is mostly in consensus (low innovation rate), and another phase in which consensus is rare (high innovation rate). On networks, degree heterogeneity affects this balance.
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A voter model with an evolving number of opinion states (with Jeehye Choi, Byungjoon Min) https://t.co/AbSxNMIbdU We study a VM in which new opinion states can emerge in the dynamics. Adapting methods previously used in theoretical evolutionary biology we compute how many >>
arxiv.org
In traditional voter models, opinion dynamics are driven by interactions between individuals, where an individual adopts the opinion of a randomly chosen neighbor. However, these models often fail...
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The joys of doing science. (This is one single resubmission, not the 11th time that we resubmit this manuscript).
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@ Landsleute im Ausland: Deutschland treibt die Digitalisierung mit Riesenschritten voran. Man kann den Antrag auf Eintrag ins Wählerverzeichnis jetzt "neu" auch per Fax (😂), email oder "sonstigem elektronischen Übermittlungsweg" (WhatsApp? X?) stellen. https://t.co/meILjAnimZ
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<<< boundary of the action simplex: a fraction of the actions are played with vanishing probability. We also calculate the critical exploration rate that guarantees convergence to a unique fixed point. [To be published in AAAI (Assoc. for the Advancement of AI) 2025]
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