Takeuchi Lab

I’m stoked to announce my next position, Buribushi Fellow (research-focused position), to start my own group as a PI at OIST in Okinawa, Japan from October. oist.jp/research/burib…

The 2nd preprint of today: arxiv.org/abs/2407.05269 By large-scale experiments, numerics & analytic theory, we clarified how collective motion of dense bacterial suspensions transitions from a stable vortex under strong confinement to active turbulence as confinement is weakened.

2 new preprints! The 1st one arxiv.org/abs/2407.05031 is about the finding that starving bacteria form bundles akin to smectic liquid crystal. We quantified the smectic order by ML-based image analysis and discussed the relevance of extracellular substances & growth arrest.

Preprint major update! arxiv.org/abs/2406.07150 With Kazuaki Takasan who joined as a coauthor, we added simulations of the quantum Heisenberg model and confirmed the partial emergence of KPZ in integrable isotropic spin chains, in such a quantum model too!

Published in PNAS pnas.org/doi/10.1073/pn… & press released! s.u-tokyo.ac.jp/en/press/10575/ “Researchers uncover what makes large numbers of “squishy” grains start flowing”

A new preprint, "Squish jamming" arxiv.org/abs/2404.09773 We realized a model experiment of extremely deformable grains and found a novel fluid-solid transition. In contrast to usual jamming controlled by the number of contacts, our jamming is triggered by the "extent of contact".

New preprint! arxiv.org/abs/2406.07150 We found “partial” yet undoubted emergence of the KPZ universality class in isotropic spin chains. Though we used a classical model, combining what is known, we can expect the same conclusion also holds for quantum systems of this kind.