Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5500315 | Physica D: Nonlinear Phenomena | 2017 | 7 Pages |
Abstract
We address that various branches of bright solitons exist in a spatially inhomogeneous defocusing nonlinearity with an imprinted antisymmetric periodic gain-loss profile. The spectra of such systems with a purely imaginary potential never become complex and thus the parity-time symmetry is unbreakable. The mergence between pairs of soliton branches occurs at a critical gain-loss strength, above which no soliton solutions can be found. Intriguingly, which pair of soliton branches will merge together can be changed by varying the modulation frequency of gain and loss. Most branches of one-dimensional solitons are stable in wide parameter regions. We also provide the first example of two-dimensional bright solitons with unbreakable parity-time symmetry.
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
Dengchu Guo, Jing Xiao, Linlin Gu, Hongzhen Jin, Liangwei Dong,