Subdiffusive transport in the Fredkin dynamical universality class
Fredkin-type kinetic constraints appear in systems ranging from classical interfaces to th e Fredkin and Motzkin quantum spin chains. Here, we identify a pseudolocal conserved charge associated with Fredkin-constrained dynamics that may be leveraged to subdiffusively bound the dynamical exponent $z\ensuremath{\ge}5/2$. Our results establish that transport in Fredkin-constrained systems belongs to a distinct dynamical universality class that is separate from ordinary diffusion. This universality class is stable to local perturbations that conserve the pseudolocal charge.
Authors
- Catherine McCarthy (ORCID: https://orcid.org/0009-0008-6588-670X)
- Sarang Gopalakrishnan (ORCID: https://orcid.org/0000-0002-7493-7600)
- Romain Vasseur (ORCID: https://orcid.org/0000-0002-4636-4139)
- Hansveer Singh
Institutions
- University of Geneva (CH)
- Princeton University (US)
- University of Massachusetts Amherst (US)
- Max Planck Institute for the Physics of Complex Systems (DE)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-05-22
- DOI
- https://doi.org/10.1103/physrevb.111.184317
- Citations
- 5
- Primary Topic
- Quantum many-body systems
- Type
- article
- Field-Weighted Citation Impact
- 6.23
Funders
- National Science Foundation
- U.S. Department of Energy
- Kavli Institute for Theoretical Physics, University of California, Santa Barbara
- Basic Energy Sciences