Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Tamilselvan, K"'
We investigate the dynamics of modulational instability (MI) in $\cal PT$-symmetric fiber Bragg gratings with a phenomenon of intermodulation known as four-wave mixing (FWM). Although the impact of FWM has already been analyzed in the conventional sy
Externí odkaz:
http://arxiv.org/abs/2411.01147
We investigate the nontrivial characteristics of modulational instability (MI) in a system of Bragg gratings with saturable nonlinearity. We also introduce an equal amount of gain and loss into the existing system which gives rise to an additional de
Externí odkaz:
http://arxiv.org/abs/2304.01927
It is well-known that third-order dispersion (TOD) never allows the continuous wave of any nonlinear Schroedinger (NLS) type system to experience modulational instability (MI). Remarkably, we demonstrate a new kind of MI induced by TOD with spatial d
Externí odkaz:
http://arxiv.org/abs/2011.14888
Publikováno v:
Phys. Lett. A 384 (2020) 126729
The integrability nature of a nonparaxial nonlinear Schr\"odinger (NNLS) equation, describing the propagation of ultra-broad nonparaxial beams in a planar optical waveguide, is studied by employing the Painlev\'e singularity structure analysis. Our s
Externí odkaz:
http://arxiv.org/abs/2007.10956
Akademický článek
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Publikováno v:
Chaos 29, 063121 (2019)
We study the formation and propagation of chirped elliptic and solitary waves in cubic-quintic nonlinear Helmholtz (CQNLH) equation. This system describes nonparaxial pulse propagation in a planar waveguide with Kerr-like and quintic nonlinearities a
Externí odkaz:
http://arxiv.org/abs/1906.02908
Autor:
Tamilselvan, K., Govindarajan, A.
Publikováno v:
In Chaos, Solitons and Fractals: the interdisciplinary journal of Nonlinear Science, and Nonequilibrium and Complex Phenomena December 2022 165 Part 2
We systematically construct a distinct class of complex potentials including parity-time ($\cal PT$) symmetric potentials for the stationary Schr\"odinger equation by using the soliton and periodic solutions of the four integrable real nonlinear evol
Externí odkaz:
http://arxiv.org/abs/1708.03083
Autor:
Niveatha S, Aruna Raju, Latha R, Tamilselvan K, Karthika Priyadharshini U, Jayamala AK, Graceline Margarat Lydia Shadrack
Publikováno v:
National Journal of Community Medicine, Vol 13, Iss 10 (2022)
Background: Heart rate variability (HRV) is a used to assess autonomic nervous system input to the heart. Studies on the impact of HRV on underweight are limited. Aims/Objectives: To evaluate HRV in age matched young adults of different BMI categor
Externí odkaz:
https://doaj.org/article/975355a3d724469e845c9fc33b6239cf
We obtain a class of elliptic wave solutions of coupled nonlinear Helmholtz (CNLH) equations describing nonparaxial ultra-broad beam propagation in nonlinear Kerr-like media, in terms of the Jacobi elliptic functions and also discuss their limiting f
Externí odkaz:
http://arxiv.org/abs/1510.01462