Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.230602
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Funding
- LabEx ENS-ICFP [ANR-10-LABX-0010/ANR-10-IDEX-0001-02 PSL]
- Netherlands Organisation for Scientific Research (NWO) [680-47-454]
- ERC [694544 OMNES]
- Slovenian Research Agency [P1-0044]
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We identify a class of one-dimensional spin and fermionic lattice models that display diverging spin and charge diffusion constants, including several paradigmatic models of exactly solvable, strongly correlated many-body dynamics such as the isotropic Heisenberg spin chains, the Fermi-Hubbard model, and the t-J model at the integrable point. Using the hydrodynamic transport theory, we derive an analytic lower bound on the spin and charge diffusion constants by calculating the curvature of the corresponding Drude weights at half-filling, and demonstrate that for certain lattice models with isotropic interactions some of the Noether charges exhibit superdiffusive transport at finite temperature and half-filling.
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