Observing weakly broken conservation laws in a dipolar Rydberg quantum spin chain
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917242136952832 |
|---|---|
| author | Chen, Cheng Capizzi, Luca Marché, Alice Bornet, Guillaume Emperauger, Gabriel Lahaye, Thierry Browaeys, Antoine Fagotti, Maurizio Mazza, Leonardo |
| author_facet | Chen, Cheng Capizzi, Luca Marché, Alice Bornet, Guillaume Emperauger, Gabriel Lahaye, Thierry Browaeys, Antoine Fagotti, Maurizio Mazza, Leonardo |
| contents | Integrable quantum many-body systems host families of extensive conservation laws, some of which are fragile: even infinitesimal perturbations can qualitatively alter their dynamical constraints. Here we show that this fragility leaves a clear experimental fingerprint in a one-dimensional quantum spin chain of as few as 14 Rydberg atoms. Weak integrability breaking from interatomic dipolar couplings is directly detectable within experimentally accessible times in the dynamics of non-local observables. In particular, magnetization fluctuations are highly sensitive to the breaking of fragile conservation laws and exhibit anomalous growth, which we observe experimentally; similar signatures appear in a semilocal string observable. Numerical simulations on substantially longer chains and a simplified classical stochastic model reproduce those features. We establish non-local observables as a sensitive probe of fragile conservation laws in quantum spin chains and Rydberg-atom arrays as a platform to test perturbative descriptions of quantum many-body dynamics with weak integrability breaking. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_02251 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Observing weakly broken conservation laws in a dipolar Rydberg quantum spin chain Chen, Cheng Capizzi, Luca Marché, Alice Bornet, Guillaume Emperauger, Gabriel Lahaye, Thierry Browaeys, Antoine Fagotti, Maurizio Mazza, Leonardo Quantum Gases Statistical Mechanics Quantum Physics Integrable quantum many-body systems host families of extensive conservation laws, some of which are fragile: even infinitesimal perturbations can qualitatively alter their dynamical constraints. Here we show that this fragility leaves a clear experimental fingerprint in a one-dimensional quantum spin chain of as few as 14 Rydberg atoms. Weak integrability breaking from interatomic dipolar couplings is directly detectable within experimentally accessible times in the dynamics of non-local observables. In particular, magnetization fluctuations are highly sensitive to the breaking of fragile conservation laws and exhibit anomalous growth, which we observe experimentally; similar signatures appear in a semilocal string observable. Numerical simulations on substantially longer chains and a simplified classical stochastic model reproduce those features. We establish non-local observables as a sensitive probe of fragile conservation laws in quantum spin chains and Rydberg-atom arrays as a platform to test perturbative descriptions of quantum many-body dynamics with weak integrability breaking. |
| title | Observing weakly broken conservation laws in a dipolar Rydberg quantum spin chain |
| topic | Quantum Gases Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2602.02251 |