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• W4283730973 startingPage "315701" @default.
• W4283730973 abstract "Abstract We consider a Hamiltonian system of coupled Van der Pol–Duffing (VdPD) oscillators with balanced loss and gain. The system is analyzed perturbatively by using renormalization group (RG) techniques as well as multiple scale analysis (MSA). Both the methods produce identical results in the leading order of the perturbation. The RG flow equation is exactly solvable and the slow variation of amplitudes and phases in time can be computed analytically. The system is analyzed numerically and shown to admit periodic solutions in regions of parameter-space, confirming the results of the linear stability analysis and perturbation methods. The complex dynamical behavior of the system is studied in detail by using time-series, Poincaré-sections, power-spectra, auto-correlation function and bifurcation diagrams. The Lyapunov exponents are computed numerically. The numerical analysis reveals chaotic behaviour in the system beyond a critical value of the parameter that couples the two VdPD oscillators through linear coupling, thereby providing yet another example of Hamiltonian chaos in a system with balanced loss and gain. Further, we modify the nonlinear terms of the model to make it a non-Hamiltonian system of coupled VdPD oscillators with balanced loss and gain. The non-Hamiltonian system is analyzed perturbatively as well as numerically and shown to posses regular periodic as well as chaotic solutions. It is seen that the <?CDATA $mathcal{P}mathcal{T}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll> <mml:mi mathvariant=script>P</mml:mi> <mml:mi mathvariant=script>T</mml:mi> </mml:math> -symmetry is not an essential requirement for the existence of regular periodic solutions in both the Hamiltonian as well as non-Hamiltonian systems." @default.
• W4283730973 created "2022-07-01" @default.
• W4283730973 creator A5012614140 @default.
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• W4283730973 date "2022-07-14" @default.
• W4283730973 modified "2023-10-14" @default.
• W4283730973 title "Complex dynamical properties of coupled Van der Pol–Duffing oscillators with balanced loss and gain" @default.
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• W4283730973 doi "https://doi.org/10.1088/1751-8121/ac7d21" @default.
• W4283730973 hasPublicationYear "2022" @default.
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