Anomalous transport in U(1)-symmetric quantum circuits
Abstract
In this work, we investigate discrete-time transport in a generic U(1)-symmetric disordered model tuned across an array of different dynamical regimes. We develop an aggregate quantity, a circular statistical moment, which is a simple function of the magnetization profile and which elegantly captures transport properties of the system. From this quantity, we extract transport exponents, revealing behaviors across the phase diagram consistent with localized, diffusive, and—most interestingly for a disordered system—superdiffusive regimes. Investigation of this superdiffusive regime reveals the existence of a prethermal “swappy” regime unique to discrete-time systems in which excitations propagate coherently; even in the presence of strong disorder.
Fields of Study & Subjects
Quantum chaos and dynamical systems
Quantum
superfluid
helium dynamics
Quantum and electron transport phenomena
Publication details
- Journal / source
- npj Quantum Information
- Publisher
- Springer Science and Business Media LLC
- Volume
- 12
- Issue
- 1
- Publication date
- 17 January 2026
- Language
- EN