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Super-ballistic diffusion induced by nonlinear interactions in a one-dimensional quasiperiodic lattice.
- Source :
-
Physics Letters A . Jul2024, Vol. 511, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- We numerically investigate the spreading dynamics of wave packets in a one-dimensional lattice with quasiperiodic disorders and nonlinear interactions. Under moderate disorder strength, we reveal an intriguing super-ballistic diffusion driven by increasing the interaction strength from the ballistic diffusion in the non- and weakly interacting cases. We obtain a wide parameter region for such a faster-than-ballistic spreading of wave packets in the quasiperiodic lattice, although the nonlinear self-trapping is dominated under strong interactions. The super-ballistic diffusion is further analyzed based on the point source model. We also show the interaction-induced sub-diffusive spreading in the Anderson localized regime. The super-ballistic and sub-diffusive dynamics are exhibited in the spreading that starts from both the single-site and Gaussian wave packets. Our results showcase the interaction-enabled super-ballistic diffusion, which is scarce and experimentally realizable in artificial atomic or photonic lattices. • The super-ballistic diffusion induced by nonlinear interactions in a one-dimensional quasiperiodic lattice is revealed, which indicates the faster-than-ballistic spreading of wave packets. • A point source model is implemented to analyze the dynamic exponent and the physical picture of the super-ballistic diffusion. • The super-ballistic diffusion can be exhibited for single-site and Gaussian wave packets, which could be experimentally observed in artificial atomic or photonic lattices. [ABSTRACT FROM AUTHOR]
- Subjects :
- *WAVE packets
*BALLISTICS
*ANDERSON localization
Subjects
Details
- Language :
- English
- ISSN :
- 03759601
- Volume :
- 511
- Database :
- Academic Search Index
- Journal :
- Physics Letters A
- Publication Type :
- Academic Journal
- Accession number :
- 177391254
- Full Text :
- https://doi.org/10.1016/j.physleta.2024.129549