Sign in

Cengiz Pehlevan

@cpehlevan.bsky.social
1.2K followers 355 following 13 posts

theory of neural networks for natural and artificial intelligence pehlevan.seas.harvard.edu

PostsRepliesMedia
Reposted by Cengiz Pehlevan
Venki Murthy @neurovenki.bsky.social · 25/09/2026
Signal boost to our tenure track faculty search in "AI in Life Sciences". Broadly construed, so PLEASE apply!!
mcb.harvard.edu
Tenure-Track Professor in Life Science and AI - Harvard University - Department of Molecular & Cellular Biology
The Life Sciences Departments in Harvard Faculty of Arts and Sciences seek to recruit a tenure-track professor whose research is at the interface of AI and life sciences, […]
1108
Reposted by Cengiz Pehlevan
Venki Murthy @neurovenki.bsky.social · 15/09/2026
Faculty Job Alert 📣! The Life Sciences Departments in Harvard Faculty of Arts and Sciences seek to recruit a tenure-track professor whose research is at the interface of AI and life sciences, from methodological developments to AI-enabled discovery. Please spread the word!
academicpositions.harvard.edu
Tenure-Track Professor in Life Science and AI
The Life Sciences Departments in Harvard Faculty of Arts and Sciences seek to recruit a tenure-track professor whose research is at the interface of AI and life sciences, from methodological developme...
02122
Reposted by Cengiz Pehlevan
Venki Murthy @neurovenki.bsky.social · 21/08/2026
New preprint! Taking inspiration from ML where train-test split is critical to show that an agent is generalizing rather than just memorizing, we did some experiments that suggest mice have an inductive bias towards generalization. Led by an amazing graduate student Ningjing Xia. See what you think!
biorxiv.org
An inductive bias for generalization in mouse olfactory learning
Animals must generalize from limited experience, yet behavioral experiments in the laboratory setting rarely assess whether or how rapidly they generalize. This contrasts with machine learning systems...
1337
Cengiz Pehlevan @cpehlevan.bsky.social · 14/08/2026
Very proud of @benjaminsruben.bsky.social and this beautiful thesis work: a theory of ensemble learning in cerebellar microzones!
081
Reposted by Cengiz Pehlevan
Ben Ruben @benjaminsruben.bsky.social · 13/08/2026
I’m happy to share the main contribution of my PhD thesis, advised by the great @cpehlevan! In short, we argue that microzones of the cerebellar cortex implement a stochastic ensemble learning algorithm: www.biorxiv.org/content/10.6... See thread below for an overview! (1/n, n=20)
biorxiv.org
Heterogeneous Instructive Signals Enable Ensemble Learning in Cerebellar Cortex
The Marr–Albus framework describes learning in Purkinje cells (PCs) through supervised plasticity associated with complex spikes. However, complex spikes occur with low probability in individual PCs f...
1203
Reposted by Cengiz Pehlevan
ICML Conference @icmlconf.bsky.social · 05/07/2026
🏆Announcing the #ICML2026 Awards! 🏆 Including Outstanding Papers (research paper & position paper, winner & honorable mentions) and the Test of Time Award! Check out the blog post for all winners (or read on), laudatio, & description of the processes. blog.icml.cc?p=1347
2132
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 06/07/2026
Congratulations to #KempnerInstitute researchers Binxu Wang, Cengiz Pehlevan, and Jacob A. Zavatone-Veth, whose paper received an #ICML2026 Outstanding Paper Honorable Mention! Read more about the paper here: bit.ly/4w6Qsq1 @binxuwang.bsky.social @jzv.bsky.social @cpehlevan.bsky.social
bit.ly
Kempner Institute Researchers Receive ICML 2026 Outstanding Paper Honorable Mention - Kempner Institute
A paper by Kempner Institute researchers has received an Outstanding Paper Honorable Mention at ICML 2026, the 43rd International Conference on Machine Learning, held July 6–11, 2026, in Seoul, South ...
0182
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 02/07/2026
📢 Just announced! Join us for the #KempnerInstitute workshop “Learning Dynamics in Natural and Artificial Intelligence: Evolution, Adaptation, and the Foundations of Efficient Learning.” Learn more, register, or submit an abstract 👉 bit.ly/3QwJlHR
bit.ly
Learning Dynamics in Natural and Artificial Intelligence - Kempner Institute
This workshop will convene researchers from artificial intelligence, neuroscience, cognitive science, and related disciplines to examine the principles governing learning and training dynamics across ...
1136
Reposted by Cengiz Pehlevan
Jacob Zavatone-Veth @jzv.bsky.social · 23/06/2026
Tremendously excited to announce that I will be joining @rockefeller.edu as an Assistant Professor and Head of Lab starting in January 2027! My group will be broadly focused on theoretical neuroscience, and mathematical problems in neural computation in the large.
Rockefeller campus image from https://commons.wikimedia.org/wiki/File:Rockefeller_University_Campus_aerial_2.jpg, licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
910515
Cengiz Pehlevan @cpehlevan.bsky.social · 24/06/2026
Congratulations, Jacob! We’ve been extremely lucky to have you at Harvard. Can’t wait to see the exciting science that comes out of your lab.
1100
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 24/06/2026
New blog post: Jailbreak Scaling Laws for #LLMs Prompt-injection attacks can boost jailbreak success from slow polynomial to exponential growth as inference-time samples increase. New on the Deeper Learning blog: bit.ly/4eK3ZfC #AI @cpehlevan.bsky.social
bit.ly
Jailbreak Scaling Laws for Large Language Models: Polynomial–Exponential Crossover - Kempner Institute
We find that adversarial prompt-injection attacks on large language models can amplify attack success rate from the slow polynomial growth observed without injection to exponential growth with the num...
021
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 28/04/2026
New preprint: "Linear equivalence of nonlinear recurrent neural networks." For large nonlinear (potentially chaotic) RNNs with random connectivity, the full N×N covariance matrix takes the same form as that of a ~linear~ network with the same couplings, driven by independent noise.
arxiv.org
Linear equivalence of nonlinear recurrent neural networks
Large nonlinear recurrent neural networks with random couplings generate high-dimensional, potentially chaotic activity whose structure is of interest in neuroscience, machine learning, ecology, and o...
15421
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 23/04/2026
🚀 Starting Day 1 of #ICLR2026 with an exciting lineup of presentations from researchers at the #KempnerInstitute! Take a look at the full list of today’s Kempner talks 👇 @iclr-conf.bsky.social #AI #NeuroAI @satpreetsingh.bsky.social @kanakarajanphd.bsky.social @annhuang42.bsky.social
1143
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 24/03/2026
🧠👃A new study by #KempnerInstitute associate faculty member Venkatesh Murthy & collaborators shows that maximizing information recreates an olfactory design shared by multiple species. Out now in @pnas.org: bit.ly/4uQ6Omw @neurovenki.bsky.social @jzv.bsky.social #neuroscience
bit.ly
New AI-based Framework Could Explain Why Evolution Gave So Many Species the Same Smell Circuit - Kempner Institute
Why do the smell circuits of flies, mice, and humans look so remarkably alike? A new study from Harvard researchers offers a possible explanation: this shared design may be the […]
0163
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 04/03/2026
NEW: #Kempner researchers develop a mean-field theory of task-trained RNNs that bridges random and learned connectivity—and find macaque motor cortex is best captured by an intermediate, task-specific recurrent structure. Read the blog post 👇 🔗 bit.ly/47f3Ldl
2249
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 04/03/2026
I am totally pumped about this new work . "Task-trained RNNs" are a powerful and influential framework in neuroscience, but have lacked a firm theoretical footing. This work provides one, and makes direct contact with the classical theory of random RNNs: www.biorxiv.org/content/10.6...
29432
Reposted by Cengiz Pehlevan
Aran Nayebi @anayebi.bsky.social · 23/02/2026
Looking forward to presenting on "How behavior shapes recurrent circuits across sensory systems and species: from vision to touch" at the University of Chicago Neuroscience and ML workshop on Wednesday! Details below 👇🧵
1164
Reposted by Cengiz Pehlevan
Mohammad Yaghoubi @mhyaghoubi.bsky.social · 16/01/2026
I’m deeply thankful to my supervisor, Mark Brandon (@markbrandonlab.bsky.social) for his patience, guidance, and constant support throughout this project, and to our collaborators in the Cengiz Pehlevan (@cpehlevan.bsky.social) lab at Harvard for their thoughtful and generous contributions.
021
Reposted by Cengiz Pehlevan
M Ganesh Kumar @mgkumar138.bsky.social · 19/01/2026
All theory is wrong until verified by data. Greatly indebted to @mhyaghoubi.bsky.social, @markbrandonlab.bsky.social, @douglasresearch.bsky.social for finding the hippocampus encoding reward prediction! Grateful to my advisor @cpehlevan.bsky.social, @kempnerinstitute.bsky.social. #RL #hippocampus
0329
Cengiz Pehlevan @cpehlevan.bsky.social · 15/01/2026
Delighted to have contributed to this work. Huge kudos to everyone involved.
1142
Reposted by Cengiz Pehlevan
Mark Brandon @markbrandonlab.bsky.social · 14/01/2026
I’m very happy to share the latest from my lab published in @Nature Hippocampal neurons that initially encode reward shift their tuning over the course of days to precede or predict reward. Full text here: rdcu.be/eY5nh
210632
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 15/12/2025
Very excited about this new work from the omnipotent Owen, with me and Ashok Litwin-Kumar! Can we reconcile low- and high-dimensional activity in neural circuits by recognizing that these circuits ~multitask~? (Plausibly, yes 😊)
0314
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 06/11/2025
Congratulations to #KempnerInstitute community members @msalbergo.bsky.social and @mweber.bsky.social — recipients of @schmidtsciences.bsky.social AI2050 Fellowships! 🎉 Discover their innovative research shaping the future of AI 👉 bit.ly/47Do4R3 #AI
bit.ly
Schmidt Sciences Awards Early Career Fellowships to Michael Albergo, Melanie Weber - Kempner Institute
Two Kempner Institute community members have received AI2050 Fellowships from Schmidt Sciences, a nonprofit organization aimed at accelerating scientific knowledge and breakthroughs. The AI2050 Progra...
0134
Reposted by Cengiz Pehlevan
Paul Masset @paulmasset.bsky.social · 04/11/2025
First paper from the lab! We propose a model that separates estimation of odor concentration and presence and map it on olfactory bulb circuits Led by @chenjiang01.bsky.social and @mattyizhenghe.bsky.social joint work with @jzv.bsky.social and with @neurovenki.bsky.social @cpehlevan.bsky.social
23913
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 03/11/2025
Now in PRX: Theory linking connectivity structure to collective activity in nonlinear RNNs! For neuro fans: conn. structure can be invisible in single neurons but shape pop. activity For low-rank RNN fans: a theory of rank=O(N) For physics fans: fluctuations around DMFT saddle⇒dimension of activity
journals.aps.org
Connectivity Structure and Dynamics of Nonlinear Recurrent Neural Networks
The structure of brain connectivity predicts collective neural activity, with a small number of connectivity features determining activity dimensionality, linking circuit architecture to network-level...
26016
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 27/10/2025
scipost.org/SciPostPhysL...
scipost.org
SciPost: SciPost Phys. Lect. Notes 105 (2025) - Simplified derivations for high-dimensional convex learning problems
SciPost Journals Publication Detail SciPost Phys. Lect. Notes 105 (2025) Simplified derivations for high-dimensional convex learning problems
092
Reposted by Cengiz Pehlevan
Blake Bordelon @frostedblakess.bsky.social · 23/10/2025
Applying to do a postdoc or PhD in theoretical ML or neuroscience this year? Consider joining my group (starting next Fall) at UT Austin! POD Postdoc: oden.utexas.edu/programs-and... CSEM PhD: oden.utexas.edu/academics/pr...
13211
Reposted by Cengiz Pehlevan
arXiv q-bio.NC Neurons and Cognition @qbionc-bot.bsky.social · 29/09/2025
William Qian, Cengiz Pehlevan: Discovering alternative solutions beyond the simplicity bias in recurrent neural networks arxiv.org/abs/2509.21504 arxiv.org/pdf/2509.21504 arxiv.org/html/2509.21504
073
Reposted by Cengiz Pehlevan
Data on the Brain & Mind @NeurIPS2025 @dataonbrainmind.bsky.social · 07/09/2025
⏳ Less than 1 day left until the Brain & Mind Workshop submission deadline! 🔍 Submit to our Finding or Tutorials track on OpenReview. Findings track submission: openreview.net/group?id=Neu... Tutorial track submission: openreview.net/group?id=Neu... More info: data-brain-mind.github.io
openreview.net
NeurIPS 2025 Workshop DBM Findings
Welcome to the OpenReview homepage for NeurIPS 2025 Workshop DBM Findings
031
Reposted by Cengiz Pehlevan
Jacob Zavatone-Veth @jzv.bsky.social · 04/09/2025
Since I'm back on BlueSky - with @frostedblakess.bsky.social and @cpehlevan.bsky.social we wrote a brief perspective on how ideas about summary statistics from the statistical physics of learning could potentially help inform neural data analysis... (1/2)
frontiersin.org
Frontiers | Summary statistics of learning link changing neural representations to behavior
How can we make sense of large-scale recordings of neural activity across learning? Theories of neural network learning with their origins in statistical phy...
1349
Reposted by Cengiz Pehlevan
Venki Murthy @neurovenki.bsky.social · 04/09/2025
Excited to share new computational work, led by @jzv.bsky.social, driven by Juan Carlos Fernandez del Castillo + contribution from Farhad Pashakanloo. We recover 3 core motifs in the olfactory system of evolutionarily distant animals using a biophysically-grounded model + efficient coding ideas!
biorxiv.org
Convergent motifs of early olfactory processing are recapitulated by layer-wise efficient coding
The architecture of early olfactory processing is a striking example of convergent evolution. Typically, a panel of broadly tuned receptors is selectively expressed in sensory neurons (each neuron exp...
02411
Reposted by Cengiz Pehlevan
Patrick Shafto @patrickshafto.bsky.social · 02/09/2025
Great to have this video about my @darpa.mil Artificial Intelligence Quantified (AIQ) program out! Very exciting program with absolutely fantastic teams. Stay tuned for some jaw dropping announcements! www.youtube.com/watch?v=KVRF...
youtube.com
AIQ: Artificial Intelligence Quantified
YouTube video by DARPAtv
071
Reposted by Cengiz Pehlevan
M Ganesh Kumar @mgkumar138.bsky.social · 27/08/2025
I am extremely grateful to be awarded the National University of Singapore (NUS) Development Grant, and to be a Young NUS Fellow! Look forward to collaborating with the Yong Loo Lin School of Medicine on exciting projects. This is my first grant and hopefully many more to come! #NUS #NeuroAI
181
Reposted by Cengiz Pehlevan
Simons Foundation @simonsfoundation.org · 19/08/2025
Our new Simons Collaboration on the Physics of Learning and Neural Computation will develop powerful tools from #physics, #math, computer science and theoretical #neuroscience to understand how large neural networks learn, compute, scale, reason and imagine: www.simonsfoundation.org/2025/08/18/s...
simonsfoundation.org
Simons Foundation Launches Collaboration on the Physics of Learning and Neural Computation
Simons Foundation Launches Collaboration on the Physics of Learning and Neural Computation on Simons Foundation
0215
Reposted by Cengiz Pehlevan
Sam Gershman @gershbrain.bsky.social · 18/08/2025
If you work on artificial or natural intelligence and are finishing your PhD, consider applying for a Kempner research fellowship at Harvard: kempnerinstitute.harvard.edu/kempner-inst...
kempnerinstitute.harvard.edu
Kempner Research Fellowship - Kempner Institute
The Kempner brings leading, early-stage postdoctoral scientists to Harvard to work on projects that advance the fundamental understanding of intelligence.
04731
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 18/08/2025
Congratulations to #KempnerInstitute associate faculty member @cpehlevan.bsky.social for joining the new @simonsfoundation.org Simons Collaboration on the Physics of Learning and Neural Computation! www.simonsfoundation.org/2025/08/18/s... #AI #neuroscience #NeuroAI #physics #ANNs
simonsfoundation.org
Simons Foundation Launches Collaboration on the Physics of Learning and Neural Computation
Simons Foundation Launches Collaboration on the Physics of Learning and Neural Computation on Simons Foundation
0143
Reposted by Cengiz Pehlevan
Surya Ganguli @suryaganguli.bsky.social · 18/08/2025
Very excited to lead this new @simonsfoundation.org collaboration on the physics of learning and neural computation to develop powerful tools from physics, math, CS, stats, neuro and more to elucidate the scientific principles underlying AI. See our website for more: www.physicsoflearning.org
physicsoflearning.org
Home | Physics Of Learning
49114
Reposted by Cengiz Pehlevan
Data on the Brain & Mind @NeurIPS2025 @dataonbrainmind.bsky.social · 04/08/2025
🚨 Excited to announce our #NeurIPS2025 Workshop: Data on the Brain & Mind 📣 Call for: Findings (4- or 8-page) + Tutorials tracks 🎙️ Speakers include @dyamins.bsky.social @lauragwilliams.bsky.social @cpehlevan.bsky.social 🌐 Learn more: data-brain-mind.github.io
03110
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 28/07/2025
The post is based on a paper written with Yue M. Lu., @jzv.bsky.social, Anindita Maiti and @cpehlevan.bsky.social evan. Check it out now at PNAS: doi.org/10.1073/pnas... (2/2)
doi.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
021
Reposted by Cengiz Pehlevan
Kempner Institute at Harvard University @kempnerinstitute.bsky.social · 28/07/2025
New in the #DeeperLearningBlog: the #KempnerInstitute's Mary Letey presents work recently published in PNAS that offers generalizable insights into in-context learning (ICL) in an analytically-solvable model architecture. bit.ly/4lPK15p #AI @pnas.org (1/2)
kempnerinstitute.harvard.edu
Solvable Model of In-Context Learning Using Linear Attention - Kempner Institute
Attention-based architectures are a powerful force in modern AI. In particular, the emergence of in-context learning enables these models to perform tasks far beyond the original next-token prediction...
164
Reposted by Cengiz Pehlevan
Anirvan Sengupta @anirvansengupta.bsky.social · 16/07/2025
At #ICML2025, presenting work done at @flatironinstitute.org w Matt Smart and @albertobietti.bsky.social on in-context denoising (arxiv.org/abs/2502.05164). Come to Matt’s oral, Thursday, 4:15-4:30 PM, West Ballroom A, and see us right after at poster #E-3207, 4:30-7:00 PM, East Exhibition Hall A-B.
arxiv.org
In-context denoising with one-layer transformers: connections between attention and associative memory retrieval
We introduce in-context denoising, a task that refines the connection between attention-based architectures and dense associative memory (DAM) networks, also known as modern Hopfield networks. Using a...
053
Cengiz Pehlevan @cpehlevan.bsky.social · 11/07/2025
Great to see this one finally out in PNAS! Asymptotic theory of in-context learning by linear attention www.pnas.org/doi/10.1073/... Many thanks to my amazing co-authors Yue Lu, Mary Letey, Jacob Zavatone-Veth @jzv.bsky.social and Anindita Maiti!
pnas.org
Asymptotic theory of in-context learning by linear attention | PNAS
Transformers have a remarkable ability to learn and execute tasks based on examples provided within the input itself, without explicit prior traini...
1235
Reposted by Cengiz Pehlevan
SfN Journals @sfnjournals.bsky.social · 14/06/2025
#eNeuro: Obeid and Miller identify distinct neural computations in the primary visual cortex that explain how surrounding context suppresses perception of visual figures and features. ‪@harvardseas.bsky.social‬ vist.ly/3n6tfb2
052
Reposted by Cengiz Pehlevan
David Lipshutz @lipshutz.bsky.social · 09/04/2025
📣 Grad students and postdocs in computational and theoretical neuroscience: please consider applying for the 2025 Flatiron Institute Junior Theoretical Neuroscience Workshop! All expenses are covered. Apply by April 14. jtnworkshop2025.flatironinstitute.org
jtnworkshop2025.flatironinstitute.org
JTN - 2025
JTN - 2025
02116
Reposted by Cengiz Pehlevan
M Ganesh Kumar @mgkumar138.bsky.social · 27/03/2025
New preprint! We trained an RNN using RL to solve a decision making task used to characterize suboptimal decision making by Schizophrenic patients. First project exploring comp psych models, thanks to @adam-manoogian.bsky.social @shawnrhoadsphd.bsky.social @bqian.bsky.social @cpehlevan.bsky.social
1105
Reposted by Cengiz Pehlevan
Paul Masset @paulmasset.bsky.social · 18/02/2025
Honoured to have been selected as a #SloanFellow Thankful for all the support from family, mentors, collaborators, colleagues and students along the way! @sloanfoundation.bsky.social
3489
Reposted by Cengiz Pehlevan
David G. Clark @david-g-clark.bsky.social · 29/01/2025
(1/30) New preprint! "Symmetries and continuous attractors in disordered neural circuits" with Larry Abbott and Haim Sompolinsky bioRxiv: www.biorxiv.org/content/10.1...
biorxiv.org
Symmetries and Continuous Attractors in Disordered Neural Circuits
A major challenge in neuroscience is reconciling idealized theoretical models with complex, heterogeneous experimental data. We address this challenge through the lens of continuous-attractor networks...
79634
Reposted by Cengiz Pehlevan
Venki Murthy @neurovenki.bsky.social · 27/01/2025
Theory in neuroscience, you say? How about this preprint by @david-g-clark.bsky.social, with a couple of others you might recognize? :-) #neuroscience
biorxiv.org
Symmetries and continuous attractors in disordered neural circuits
A major challenge in neuroscience is reconciling idealized theoretical models with complex, heterogeneous experimental data. We address this challenge through the lens of continuous-attractor networks...
0359
Reposted by Cengiz Pehlevan
M Ganesh Kumar @mgkumar138.bsky.social · 17/12/2024
Our preprint with @frostedblakess.bsky.social, @jzv.bsky.social, @cpehlevan.bsky.social is out! We develop a simple reinforcement learning model that recapitulates 3 disparate hippocampal dynamics. With ablation studies, these representations improve the speed and flexibility of policy learning.
3165