5.8k citations · 32.8k across the 135 of their papers we have counts for
44 papers · 1 filter
Network topology shapes consensus and vulnerability in LLM populations
Roberto Passaro, Ariel Flint, Romualdo Pastor-Satorras +2
As large language models (LLMs) are deployed in interacting populations, their collective behaviour depends not only on the models but also on who interacts with whom. Studies of c…
Statistical Physics of Fish Collective Motion
Elena G. de Lamo, M. C. Miguel, R. Pastor-Satorras
We review recent theoretical and empirical advances that recast fish schooling within a statistical-physics framework, emphasizing how heterogeneous and time-dependent interactions…
Symmetry breaking in collective decision-making through higher-order interactions
David March-Pons, Romualdo Pastor-Satorras, M. Carmen Miguel
Collective decision-making is a widespread phenomenon in both biological and artificial systems, where individuals reach a consensus through social interactions. While traditional…
Modeling individual attention dynamics on online social media
Jaume Ojer, Filippo Radicchi, Santo Fortunato +2
In the attention economy, understanding how individuals manage limited attention is critical. We introduce a simple model describing the decay of a user's engagement when facing mu…
Competition between simple and complex contagion on temporal networks
Elsa Andres, Romualdo Pastor-Satorras, Michele Starnini +1
Behavioral adoptions are influenced by peers in different ways. While some individuals may change after a single incoming influence, others need multiple cumulated attempts. These…
Charting multidimensional ideological polarization across demographic groups in the United States
Jaume Ojer, David Cárcamo, Romualdo Pastor-Satorras +1
Has ideological polarization actually increased in the last decades, or have voters simply sorted themselves into parties matching their ideology more closely? We present a novel m…
Social Network Heterogeneity Promotes Depolarization of Multidimensional Correlated Opinions
Jaume Ojer, Michele Starnini, Romualdo Pastor-Satorras
We propose the multidimensional social compass model, based on two competing key ingredients: DeGroot learning, driven by the social influence exerted across multiple topics, and t…
Modeling Explosive Opinion Depolarization in Interdependent Topics
Jaume Ojer, Michele Starnini, Romualdo Pastor-Satorras
Understanding the dynamics of opinion depolarization is pivotal to reducing the political divide in our society. We propose an opinion dynamics model, which we name the social comp…
Flocking dynamics mediated by weighted social networks
Jaume Ojer, Romualdo Pastor-Satorras
We study the effects of animal social networks with a weighted pattern of interactions on the flocking transition exhibited by models of self-organized collective motion. Consideri…
The advantage of self-protecting interventions in mitigating epidemic circulation at the community level
Romualdo Pastor-Satorras, Claudio Castellano
Protecting interventions of many types (both pharmaceutical and non-pharmaceutical) can be deployed against the spreading of a communicable disease, as the worldwide COVID-19 pande…
Influence of individual nodes for continuous-time Susceptible-Infected-Susceptible dynamics on synthetic and real-world networks
Alfredo De Bellis, Romualdo Pastor-Satorras, Claudio Castellano
In the study of epidemic dynamics a fundamental question is whether a pathogen initially affecting only one individual will give rise to a limited outbreak or to a widespread pande…
The localization of non-backtracking centrality in networks and its physical consequences
Romualdo Pastor-Satorras, Claudio Castellano
The spectrum of the non-backtracking matrix plays a crucial role in determining various structural and dynamical properties of networked systems, ranging from the threshold in bond…
Influential spreaders for recurrent epidemics on networks
Gaël Poux-Médard, Romualdo Pastor-Satorras, Claudio Castellano
The identification of which nodes are optimal seeds for spreading processes on a network is a non-trivial problem that has attracted much interest recently. While activity has most…
Scalar model of flocking dynamics on complex social networks
M. Carmen Miguel, Romualdo Pastor-Satorras
We investigate the effects of long-range social interactions in flocking dynamics by studying the dynamics of a scalar model of collective motion embedded in a complex network repr…
Spectral properties and the accuracy of mean-field approaches for epidemics on correlated networks
Diogo H. Silva, Silvio C. Ferreira, Wesley Cota +2
We present a comparison between stochastic simulations and mean-field theories for the epidemic threshold of the susceptible-infected-susceptible (SIS) model on correlated networks…
Quantifying echo chamber effects in information spreading over political communication networks
Wesley Cota, Silvio C. Ferreira, Romualdo Pastor-Satorras +1
Echo chambers in online social networks, in which users prefer to interact only with ideologically-aligned peers, are believed to facilitate misinformation spreading and contribute…
Generalized Voter-like model on activity driven networks with attractiveness
Antoine Moinet, Alain Barrat, Romualdo Pastor Satorras
We study the behavior of a generalized consensus dynamics on a temporal network of interactions, the activity driven network with attractiveness. In this temporal network model, ag…
Eigenvector localization in real networks and its implications for epidemic spreading
Romualdo Pastor-Satorras, Claudio Castellano
The spectral properties of the adjacency matrix, in particular its largest eigenvalue and the associated principal eigenvector, dominate many structural and dynamical properties of…
Effects of heterogeneous social interactions on flocking dynamics
M. Carmen Miguel, Jack T. Parley, Romualdo Pastor-Satorras
Social relationships characterize the interactions that occur within social species and may have an important impact on collective animal motion. Here, we consider a variation of t…
Effect of risk perception on epidemic spreading in temporal networks
Antoine Moinet, Alain Barrat, Romualdo Pastor Satorras
Many progresses in the understanding of epidemic spreading models have been obtained thanks to numerous modeling efforts and analytical and numerical studies, considering host popu…
Robust modeling of human contact networks across different scales and proximity-sensing techniques
Michele Starnini, Bruno Lepri, Andrea Baronchelli +3
The problem of mapping human close-range proximity networks has been tackled using a variety of technical approaches. Wearable electronic devices, in particular, have proven to be…
Evolutionary dynamics of the cryptocurrency market
Abeer ElBahrawy, Laura Alessandretti, Anne Kandler +2
The cryptocurrency market surpassed the barrier of $100 billion market capitalization in June 2017, after months of steady growth. Despite its increasing relevance in the financia…
Relating Topological Determinants of Complex Networks to Their Spectral Properties: Structural and Dynamical Effects
Claudio Castellano, Romualdo Pastor-Satorras
The largest eigenvalue of a network's adjacency matrix and its associated principal eigenvector are key elements for determining the topological structure and the properties of dyn…
On the numerical study of percolation and epidemic critical properties in networks
Claudio Castellano, Romualdo Pastor-Satorras
The static properties of the fundamental model for epidemics of diseases allowing immunity (susceptible-infected-removed model) are known to be derivable by an exact mapping to bon…