A class of complex breather and soliton solutions to both KdV and mKdV equations are identified with a Pöschl-Teller type -symmetric potential. However, these solutions represent only the unbroken- phase owing to their isospectrality to an infinite potential well in the complex plane having real spectra. To obtain the broken- phase, an extension of the potential satisfying the potential algebra is mandatory that additionally supports non-trivial zero-width resonances.
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http://dx.doi.org/10.1038/s41598-024-65432-3 | DOI Listing |
Sci Rep
July 2024
Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India.
Philos Trans A Math Phys Eng Sci
November 2022
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Prospekt Acad. Lavrentyeva 15, Novosibirsk 630090, Russia.
The problem of description of stationary vibrations is studied for a planar thermoelastic body incorporating thin inclusions. This problem contains two small positive parameters [Formula: see text] and [Formula: see text], which describe the thickness of an individual inclusion and the distance between two neighbouring inclusions, respectively. Relying on the variational formulation of the problem, by means of the modern methods of asymptotic analysis, we investigate the behaviour of solutions as [Formula: see text] and [Formula: see text] tend to zero.
View Article and Find Full Text PDFSci Rep
July 2021
Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
An electromagnetic (EM) pulse falling on a plasma medium from vacuum can either reflect, get absorbed or propagate inside the plasma depending on whether it is overdense or underdense. In a magnetized plasma, however, there are usually several pass and stop bands for the EM wave depending on the orientation of the magnetic field with respect to the propagation direction. The EM wave while propagating in a plasma can also excite electrostatic disturbances in the plasma.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2021
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991, Moscow, Russia.
Quantum interference dramatically modulates electron transport that provides exciting prospects for molecular electronics. We develop a holistic picture of quantum interference phenomena in molecular conductors based on conjugated hydrocarbons taking into account the interaction of resonances and antiresonances (AR). This interaction can result in the coalescence of resonances and ARs accompanied by a significant quantum transparency change.
View Article and Find Full Text PDFRep Prog Phys
April 2021
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia.
I review the four mechanisms of bound states in the continuum (BICs) in the application of microwave and acoustic cavities open to directional waveguides. The most simple are symmetry-protected BICs, which are localized inside the cavity because of the orthogonality of the eigenmodes to the propagating modes of waveguides. However, the most general and interesting is the Friedrich-Wintgen mechanism, when the BICs are the result of the fully destructive interference of outgoing resonant modes.
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