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AbstractAbstract
[en] The theory of envelope solitons of surface waves in a thin slab of magnetized plasma in the case of strong static magnetic field is taken up in the present study
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Source
Transl.: Cover-to-cover translation of Fizika Plazmy (USSR).
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Journal Article
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Translation
Journal
Soviet Journal of Plasma Physics (English Translation); ISSN 0360-0343;
; CODEN SJPPD; v. 14(3); p. 208-210

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AbstractAbstract
[en] Bulk properties of the exciton-polariton dispersion in the presence of a uniform electric field and for frequencies near the first excitonic resonance are studied within the framework of Stahl's coherent band dynamics. A relative simple expression for the excitonic susceptibility (and thus for the dispersion relation) is derived and applied for calculating the field dependence of the transverse excitonic frequency. By an appropriate choice of a certain fitting parameter the calculated energy shift agrees satisfactorily with experimental values obtained recently by Schultheis and Kohler
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Journal Article
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Nuovo Cim., D; CODEN NCSDD; v. 9(7); p. 781-790
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AbstractAbstract
[en] The existence of a two-parameter set of dressed Langmuir solitons is shown numerically, resolving a discrepancy among earlier investigations
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Pandey, A.N.; Upadhyay, K.S.; Singh, M.
Proceedings of the nuclear physics and solid state physics symposium [held at] Ahmedabad, December 27-31, 1976
Proceedings of the nuclear physics and solid state physics symposium [held at] Ahmedabad, December 27-31, 1976
AbstractAbstract
[en] Sulphide, selenide and telluride of lead are narrow gap ionic semiconductors crystallising in the NaCl structure. These compounds have attracted considerable interest during the recent years due to their remarkable dielectric properties. Coherent inelastic scattering of neutrons has provided a wealth of scattering of neutrons has provided us a wealth of data on their phonon dispersion relations. An extensive investigation of the lattice dynamics of these chalcogenides has been presented by employing a different variation of rigid shell model which incorporates the effect of deformation of electron shells as an additional of freedom. The model thus obtained contains the three-body interaction terms as a natural consequence of the regorous theory. The computed phonon frequencies along symmetry directions on most of them are in relatively good agreement with the measured ones, particularly along optical branches, as compaared to the other models. The Debye temperatures variation has also been found to explain the observed data successfully. Thus the inclusion of electron shell diformation effects in the study of the dynamical behaviour of PbS, PbSe and PbTe seems to be quite reasonable. (author)
Source
Department of Atomic Energy, Bombay (India); p. 149-151; 1977; p. 149-151; Department of Atomic Energy; Bombay; Nuclear physics and solid state physics symposium; Ahmedabad, India; 27 - 31 Dec 1976
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Book
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Conference
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Bogolyubskij, I.L.; Makhan'kov, V.G.; Shvachka, A.B.
Conference on programming and mathematical methods for solving the physical problems
Conference on programming and mathematical methods for solving the physical problems
AbstractAbstract
[en] Using a computer, collisions of oscillating solitons (pulsons) are investigated, their properties depending on space dimension. The results referring to the collision of plane one-dimensional pulsons are described. The properties of motionless cylindrical-symmetrical (CS) pulsons are discussed. The dynamics of their head-on collisions is considered at A=0.4 and at the velocities V1=-V2=V=0.2; 0.3; 0.4 and 0.6 (A is the amplitude of field oscillations). Computer calculations show that CS pulsons are stable relative to angular perturbations. At not very small velocities they pass the distance much exceeding their characteristic size. Head-on collision generates strong disturbances of the field function. At the initial velocity V=0.4 pulsons, after mutual overlapping, divide into two dispersing clusters, but then pulsons are spreading out. At less velocities (V=0.2) no division into two clusters is observed. It is noted that conservation of the number of unstable quasiparticles in head-on collisions at V>Vsub(cr) approximately 0.3 is an interesting manifestation of soliton properties
Original Title
Chislennoe issledovanie stolknovenij odnomernykh i dvumernykh pul'sonov v modeli nelinejnogo uravneniya Klejna-Gordona
Primary Subject
Source
Joint Inst. for Nuclear Research, Dubna (USSR); p. 33-37; 1978; p. 33-37; Conference on programming and mathematical methods for solving the physical problems; Dubna, USSR; 20 - 23 Sep 1977; 8 refs.; 2 figs.
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Report
Literature Type
Conference
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Zhao Hai-Qiong; Yu Guo-Fu, E-mail: hqzhao@163.com, E-mail: gfyu@sjtu.edu.cn
AbstractAbstract
[en] In this paper, we give a coupled lattice equation with the help of Hirota operators, which comes from a special BKP lattice. Two-soliton and three-soliton solutions to the coupled system are constructed. Furthermore, resonant interaction of the two-soliton solution is analyzed in detail. Under some special resonant condition, it is shown that low soliton can propagate faster than high one. Finally, the N-soliton solution is presented in the Pfaffian form. (general)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0253-6102/62/2/11; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Communications in Theoretical Physics; ISSN 0253-6102;
; v. 62(2); p. 235-244

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Takahashi, J.; Nakamura, Y.; Yamanaka, Y., E-mail: phyco-sevenface@asagi.waseda.jp, E-mail: nakamura@aoni.waseda.jp, E-mail: yamanaka@waseda.jp
arXiv e-print [ PDF ]
arXiv e-print [ PDF ]
AbstractAbstract
[en] A complex eigenvalue in the Bogoliubov–de Gennes equations for a stationary Bose-Einstein condensate in the ultracold atomic system indicates the dynamical instability of the system. We also have the modes with zero eigenvalues for the condensate, called the zero modes, which originate from the spontaneous breakdown of symmetries. Although the zero modes are suppressed in many theoretical analyses, we take account of them in this paper and argue that a zero mode can change into one with a pure imaginary eigenvalue by applying a symmetry breaking external perturbation potential. This emergence of a pure imaginary mode adds a new type of scenario of dynamical instability to that characterized by the complex eigenvalue of the usual excitation modes. For illustration, we deal with two one-dimensional homogeneous Bose–Einstein condensate systems with a single dark soliton under a respective perturbation potential, breaking the invariance under translation, to derive pure imaginary modes. - Highlights: • Zero modes are important but ignored in many theories for the cold atomic system. • We discuss the zero mode under symmetry breaking potential in this system. • We consider the zero mode of translational invariance for a single dark soliton. • We show that it turns into an anomalous or pure imaginary mode
Primary Subject
Source
S0003-4916(14)00112-2; Available from http://dx.doi.org/10.1016/j.aop.2014.05.004; Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] We study the dynamics of a high-energy laser pulse in dispersive optical media with large values of self-steepening. We consider the formation of soliton-like peaks at the front of the envelope in such media with anomalous dispersion. We show the possibility of realisation of a medium based on a photonic crystal waveguide with a very large absolute value of the self-steepening parameter in a certain frequency range. (nonlinear optical phenomena)
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Source
Available from http://dx.doi.org/10.1070/QE2013v043n11ABEH015228; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Quantum Electronics (Woodbury, N.Y.); ISSN 1063-7818;
; v. 43(11); p. 1029-1036

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AbstractAbstract
[en] We investigate localized exciton states in π-conjugated polymers with finite torsion. The localized states are associated with a perturbed transfer integral for which the magnitude of cosine of the torsion angle exceeds the magnitude of the corresponding cosine of the unperturbed system. The localized-state energy and spatial extent are calculated as a function of the ratio of the perturbed to unperturbed transfer integrals. Particular attention is paid to the optically active symmetric localized states, and the effective oscillator strength, or square of the absolute magnitude of the transition dipole moment, is calculated as a function of the energy. The relation of the theory to recent optical studies of poly(di-n-octylfluorene) (PF8) is discussed
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S0022-2313(06)00571-0; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Toikka, L A; Kärki, O; Suominen, K-A, E-mail: laantoi@utu.fi, E-mail: olkark@utu.fi, E-mail: kalle-antti.suominen@utu.fi
AbstractAbstract
[en] We propose a protocol for the simultaneous controlled creation of multiple concentric ring dark solitons in a toroidally trapped flat Bose–Einstein condensate. The decay of these solitons into a vortex–antivortex necklace shows revivals of the soliton structure, but eventually becomes an example of quantum turbulence. (fast track communications)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0953-4075/47/2/021002; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Physics. B, Atomic, Molecular and Optical Physics; ISSN 0953-4075;
; CODEN JPAPEH; v. 47(2); [6 p.]

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