Riemann–Hilbert Problems, Polynomial Lax Pairs, Integrable Equations and Their Soliton Solutions

VS Gerdjikov, AA Stefanov - Symmetry, 2023 - mdpi.com
The standard approach to integrable nonlinear evolution equations (NLEE) usually uses the
following steps:(1) Lax representation [L, M]= 0;(2) construction of fundamental analytic …

Breather waves, high-order rogue waves and their dynamics in the coupled nonlinear Schrödinger equations with alternate signs of nonlinearities

WQ Peng, SF Tian, TT Zhang - Europhysics letters, 2019 - iopscience.iop.org
We consider the analytic vector breather and high-order rogue wave solutions for the
coupled nonlinear Schrödinger (NLS) equations with alternate signs of nonlinearities via …

Multicomponent Fokas–Lenells equations on Hermitian symmetric spaces

VS Gerdjikov, RI Ivanov - Nonlinearity, 2021 - iopscience.iop.org
Multi-component integrable generalizations of the Fokas–Lenells equation, associated with
each irreducible Hermitian symmetric space are formulated. Description of the underlying …

Kulish–Sklyanin-type models: Integrability and reductions

VS Gerdjikov - Theoretical and Mathematical Physics, 2017 - Springer
We start with a Riemann–Hilbert problem (RHP) related to BD. I-type symmetric spaces SO
(2 r+ 1)/S (O (2 r− 2 s+ 1)⊗ O (2 s)), s≥ 1. We consider two RHPs: the first is formulated on …

Fundamental analytic solutions for the Kulish-Sklyanin model with constant boundary conditions

VS Gerdjikov, AO Smirnov - AIP Conference Proceedings, 2022 - pubs.aip.org
In the present paper we analyze the construction of fundamental analytic solutions (FAS) for
the generalized Kulish-Sklyanin models (KSM) for vanishing (VBC) and constant boundary …

Модели типа Кулиша–Склянина: интегрируемость и редукции

ВС Герджиков - Теоретическая и математическая физика, 2017 - mathnet.ru
Рассмотрена задача Римана–Гильберта, связанная с симметричными пространствами
SO (2r+ 1)/S (O (2r− 2s+ 1)⊗ O (2s)), s⩾ 1, типа BD. I. Речь идет о двух задачах Римана …

[PDF][PDF] On generalized Kulish-Sklyanin models

A Florian, VS Gerdjikov… - Annals of the University …, 2020 - cis01.central.ucv.ro
We consider a class of Lax operators L related to BD. I type symmetric spaces. They allow
one to solve special classes of vector NLS and matrix equations known as generalizations of …

On the Spectral Properties of Lax Operators Related to BD. I Symmetric Spaces

A Streche-Pauna, AD Florian, VS Gerdjikov - Advanced Computing in …, 2021 - Springer
We consider a class of Lax operators L related to BD. I type symmetric spaces. They allow
one to solve a special class of vector NLS equations which model Bose-Einstein …

Two-component NLS equations: Hamiltonian Properties and Generalized Fourier Transforms

VS Gerdjikov - mds2017.math.bas.bg
Recently several new 2-component integrable NLS equations (2-NLSE) have been
discovered [1, 2]. Our main result is to demonstrate a family of 2-NLSE related to the …

New Examples of Two-component NLS Equations

AA Stefanov, VS Gerdjikov - mds2017.math.bas.bg
The Manakov model [3] is the first example of a two-component Non-Linear Schrodinger
(NLS) equation that finds numerous applications in physics. It is natural to look for other …