# Hilbert Space Fragmentation from Generalized Symmetries

Source: [feeds.aps.org](http://link.aps.org/doi/10.1103/9h5h-cglm) · 2026-11-12 · Physics
Page: https://themorning.science/story/hilbert-space-fragmentation-from-generalized-symmetries-cc72e5301e38a487
Kind: research · Impact: low

## In brief

- Hilbert space fragmentation is described as exponential growth in the number of dynamically disconnected Krylov sectors with system size.
- Fragmentation is taken as evidence of ergodicity breaking, since conventional thermalization arguments may fail.
- The paper, published in an APS journal, is by Thea Budde, Marina Kristić Marinković, and Joao C. Pinto Barros.

## Why it matters

The work relates fragmentation of Hilbert space to generalized symmetries, offering a framework for understanding when quantum systems fail to thermalize, which matters for researchers studying ergodicity and many-body quantum dynamics.

## Timeline

- 2026-11-12: Paper reported by feeds.aps.org

## Coverage

- [Hilbert Space Fragmentation from Generalized Symmetries](http://link.aps.org/doi/10.1103/9h5h-cglm) — feeds.aps.org, 2026-11-12

Tags: hilbert space fragmentation, generalized symmetries, ergodicity breaking, krylov sectors, quantum many-body

---

Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Science – https://themorning.science