87 citations · 627 across the 29 of their papers we have counts for
29 papers
Inferring the microscopic mechanisms of opinion dynamics using a kinetic Ising model
Ixandra Achitouv, David Chavalarias, Vincent Lahoche
Kinetic Ising models are widely used to describe binary opinion dynamics, but their microscopic validity has rarely been tested empirically. Here, we infer the transition probabili…
D-MODD: A Diffusion Model of Opinion Dynamics Derived from Online Data
Ixandra Achitouv, David Chavalarias, Raphael Fournier-S'niehotta
We present the first empirical derivation of a continuous-time stochastic model for real-world opinion dynamics. Using longitudinal social-media data to infer users opinion on a bi…
Unveiling Political Influence Through Social Media: Network and Causal Dynamics in the 2022 French Presidential Election
Ixandra Achitouv, David Chavalarias
During the 2022 French presidential election, we collected daily Twitter messages on key topics posted by political candidates and their close networks. Using a data-driven approac…
Constructing the low-temperature phase diagram for the -quantum spin glass using the nonperturbative renormalization group
Ixandra Achitouv, Vincent Lahoche, Dine Ousmane Samary +1
In this paper, we use a nonperturbative renormalization group approach to construct the dynamical phase space of a quantum spin glass in the large limit. The disordered Hamilto…
Time-translation invariance symmetry breaking hidden by finite-scale singularities
Ixandra Achitouv, Vincent Lahoche, Dine Ousmane Samary +1
In this paper, we consider a renormalization group perspective on the quantum dynamics of a particle moving in the Euclidean space through the complex landscape prov…
Signal inference in financial stock return correlations through phase-ordering kinetics in the quenched regime
Ixandra Achitouv, Vincent Lahoche, Dine Ousmane Samary
Financial stock return correlations have been analyzed through the lens of random matrix theory to differentiate the underlying signal from spurious correlations. The continuous sp…