Diksha Gupta, PhD

Diksha Gupta, PhD

Senior Research Fellow

Pivotal Research

Hi, I am Diksha :)

I study how neural networks solve complex cognitive tasks, and diagnose when and how they fail. My interests lie at the intersection of LLM training dynamics, alignment, and interpretability.

I am currently a senior research fellow at Pivotal, working with Stefan Heimersheim on the continuity of LLM activation manifolds and what that implies for manifold-aware steering and probing. Previously, I worked on red-teaming unlearning methods for open-weight safety.

Before that, I was a senior research fellow at the Sainsbury Wellcome Centre at University College London, with the Behrens and Mrsic-Flogel labs, studying compositional representations and their learning algorithms in artificial and biological neural networks. During my PhD with Carlos Brody at Princeton University, I developed ablation-aware methods to train RNNs on cognitive tasks to improve capability attribution, and better models to track systematic biases in decision-making and predict previously unpredictable failures, working from neural recordings and causal experiments in rodents playing carefully crafted structured games.

Education and Positions

 
 
 
 
 
Senior Research Fellow
with Stefan Heimersheim (Adecco/Google DeepMind)
July 2026 – Present London, UK
 
 
 
 
 
Senior Research Fellow
with Tim Behrens and Thomas Mrsic-Flogel
February 2023 – June 2026 London, UK
 
 
 
 
 
Ph.D. in Quantitative and Computational Neuroscience
with Carlos Brody
September 2017 – January 2023 NJ, USA
 
 
 
 
 
M.A. in Neuroscience
September 2015 – September 2017 NJ, USA
 
 
 
 
 
B.Tech. in Bioengineering
July 2011 – July 2015 UP, India

Peer-reviewed publications

A multi-region recurrent circuit for evidence accumulation in rats
No central executive? Decision formation through multi-area population dynamics
Transitions in dynamical regime and neural mode during perceptual decisions
Disentangling the roles of distinct cell classes with cell-type dynamical systems
An approach for long-term, multi-probe Neuropixels recordings in unrestrained rats
Multiple network properties overcome random connectivity to enable stereotypic sensory responses

Preprints

To integrate or not to integrate: testing degenerate strategies for solving an accumulation of perceptual evidence decision-making task

Organising & Teaching

Organising

Teaching

  • 2024–25 Barcelona Advanced Modeling of Behavior (BAMB!) summer school, Barcelona - teaching assistant
  • 2023 Neuromatch Academy, computational neuroscience track - project mentor
  • 2021 Neuromatch Academy, computational neuroscience track - project TA for 11 student teams
  • 2017 Introduction to Neuroscience (NEU 175, undergraduate), Princeton University - teaching assistant
  • 2016 Introduction to Neuroscience (NEU 501A, graduate), Princeton University - teaching assistant

Talks

  • Aug 2026 Pivotal Spotlight, London Initiative for Safe AI (LISA) selected representation structure
  • Aug 2026 Pivotal Lightning talk, UK AISI selected representation structure
  • May 2026 Symposium on Biology of Decision Making (SBDM), Paris invited failure modes
  • Mar 2026 IDIBAPS - Institut d’Investigacions Biomèdiques August Pi i Sunyer, Barcelona invited decision circuits
  • Dec 2025 AI Research Afternoon, Faculty of Life Sciences, University College London invited decision circuits
  • Nov 2025 Minisymposium, Society for Neuroscience annual meeting invited decision circuits
  • Nov 2023 Colloquium, Leiden Institute for Brain and Cognition, Leiden University invited failure modes
  • Oct 2023 Society for Neuroeconomics annual meeting selected Travel Award failure modes
  • Oct 2023 Brain Stories Live, Episode 18: Neuro AI - public panel at the Bloomsbury Theatre, with Rick Adams and Benedetto De Martino panel listen
  • Sep 2023 Analytical Connectionism Workshop, Gatsby Computational Neuroscience Unit selected decision circuits
  • Mar 2023 Computational and Systems Neuroscience (COSYNE) conference selected top 3% of abstracts decision circuits
  • June 2022 Reinforcement Learning and Decision Making (RLDM) conference selected Best Paper Award failure modes
  • May 2022 Annual retreat, Princeton Neuroscience Institute invited decision circuits
  • Apr 2022 Center for Neural Science, New York University invited decision circuits
  • Mar 2022 Computational Cognitive Neuroscience seminar, UMC Hamburg-Eppendorf invited failure modes
  • Mar 2022 HHMI Janelia Research Campus invited decision circuits
  • Oct 2021 Experimental Psychology seminar, Bolivian Catholic University invited decision circuits