Non-Hermitian Origin of Surface Peregrine Soliton and Its Topological Signatures

Samit Kumar Gupta

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arXiv · 2509.05493

Non-Hermitian Origin of Surface Peregrine Soliton and Its Topological Signatures

Samit Kumar Gupta

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Abstract

A wide range of dynamic wave localization phenomena manifest underlying physical effects in diverse areas of physics which often bear signatures of nontrivial coherent wave structures. A Peregrine soliton draws particular interest because of its space-time localization and the prototypical analogy to extreme waves. We show the emergence of strikingly nontrivial complex wave phenomena in the unbroken and broken regimes of parity-time (PT) symmetry of a class of composite optical media based on a PT variant of the standard nonlinear Schr\"odinger equation (NLSE). It gives rise to a symmetry-protected self-dual pair of chiral bulk Peregrine and anti-Peregrine solitons. Remarkably, a stable soliton propagates unhindered in the exact PT phase and a surface Peregrine soliton emerges in the broken PT phase at the optical interface between two strongly heterogeneous optical media. We show that such a surface mode emanates from the interplay between the non-Hermitian pseudo-self-induced PT potential and a nonlinearity-dispersion modulation scheme forming a non-Hermitian topological domain wall. A persistent collapse and revival dynamics exists between the pair of Peregrine and anti-Peregrine solitons and the surface Peregrine soliton at the optical interface. The topological signatures of the surface Peregrine soliton are discussed. The results could be interesting at the crossroads of nonlinear optics, non-Hermitian physics, and topological phenomena for controllable wave manipulation in complex optical and scattering media.

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Samit Kumar Gupta. 2025-09-05. Non-Hermitian Origin of Surface Peregrine Soliton and Its Topological Signatures. https://arxiv.org/abs/2509.05493

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