Jonathan Ehrenreich Laursen

Computational Neuroscience · Bayesian Statistics · Active Inference

MSc Neural Systems and Computation @ ETH Zürich & University of Zürich

---

About

I'm a master's student in Neural Systems and Computation at ETH Zürich and the University of Zürich, with a BSc in Cognitive Science from Aarhus University. My work sits at the intersection of Bayesian statistics, AI, computational neuroscience, and Active Inference, where I build and fit mathematical models of how minds infer and act in the world.

Since January 2025, I've been a software developer at the Theoretical Neurobiology Unit (TNU) at ETH Zürich, where I co-authored and help maintain ActiveInference.jl, a Julia library for simulation and parameter estimation of Active Inference models.

Outside of research, I read broadly in philosophy of science and existential philosophy, play guitar, and rarely turn down a board game.

---

Featured Work

ActiveInference.jl A Julia library for simulation and parameter estimation with Active Inference models. Published in Entropy (2025).

More repositories below — feel free to explore.

---

Tech Stack

Languages

Methods & Tools

Research Areas

---

Publications

• Nehrer, S.W.†, Laursen, J.E.†, Conor, H., Friston, K., Mathys, C., Waade, P.T. — "Introducing ActiveInference.jl: a Julia Library for Simulation and Parameter Estimation with Active Inference Models" — Entropy, 2025
• Waade, P.T., Olesen, C.L., Laursen, J.E., Nehrer, S.W., Conor, H., Friston, K., Mathys, C. — "As One and Many: Relating Individual and Emergent Group-Level Generative Models in Active Inference" — Entropy, 2025

† shared first authorship

---

_{📍 Zürich, Switzerland  ·  🇩🇰 Danish  ·  Open to research collaborations}