Marius Lemm

@mariuslemm.bsky.social

Professor of #MathematicalPhysics at University of Tübingen (@unituebingen.bsky.social) Working on #quantum many-body physics and mathematical analysis Website: https://www.math.uni-tuebingen.de/de/forschung/maphy/personen/mariuslemm/mariuslemm

Lightning strikes and the flash reaches you almost instantly, but the thunder takes longer. At @unituebingen.bsky.social, mathematicians study the quantum equivalent: how fast information can travel through an interacting quantum system. #ICM2026 https://youtu.be/8Uuef69MoNM

The Mathematics of Quantum Propagation | University of Tübingen

Physics has repeatedly transformed mathematics by creating entirely new scientific questions. From fluid dynamics to gen

youtu.be

OpenAI's claim that this is a central conjecture in discrete geometry is not an exaggeration. This will I think be looked back on as the first time that AI solved a major mathematics problem (defined as a problem that all experts in some subfield had thought about). openai.com/index/model-...

An OpenAI model has disproved a central conjecture in discrete geometry

An OpenAI model solved the 80-year-old unit distance problem, disproving a major conjecture in discrete geometry and marking a milestone in AI-driven mathematics.

openai.com

New preprint with Carla Rubiliani and Jingxuan Zhang "On the quantum dynamics of long-ranged Bose-Hubbard Hamiltonians" arxiv.org/abs/2505.01786 We prove that the speed of boson propagation is bounded under the optimal long-range condition (for power law exponent \alpha>d+1)

On the quantum dynamics of long-ranged Bose-Hubbard Hamiltonians

We study the quantum dynamics generated by Bose-Hubbard Hamiltonians with long-ranged (power law) terms. We prove two ballistic propagation bounds for suitable initial states: (i) A bound on all momen...

arxiv.org

To reach some consensus about the prospects of near-term (late nisq and early fault tolerant) quantum computing, we had a 3-day discussion event (“Quantum Now”) in Lapland with both optimists and pessimists. This continued at SeeQA 2024 in Oxford. See our conclusions here arxiv.org/abs/2501.05694

Myths around quantum computation before full fault tolerance: What no-go theorems rule out and what they don't

In this perspective article, we revisit and critically evaluate prevailing viewpoints on the capabilities and limitations of near-term quantum computing and its potential transition toward fully fault...

arxiv.org