Lakshmanan, M. (1974) Nonlinear chiral dispersive waves Journal of Physics A: Mathematical, Nuclear and General, 7 (8). pp. 889-897. ISSN 0301-0015
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Official URL: http://iopscience.iop.org/0301-0015/7/8/003
Related URL: http://dx.doi.org/10.1088/0305-4470/7/8/003
Abstract
Whitham's theory of nonlinear water waves is applied to a classical field with the lagrangian density L=1/2((( delta mu phi )( delta mu phi )-m2 phi 2)/(1+ lambda phi 2)). This is the isoscalar analogue of a chiral invariant SU(2)(X)SU(2) lagrangian with symmetry breaking term included. The corresponding field equation admits simple harmonic plane-wave solutions. The author found that the important field quantities of these waves, namely the wavenumber k and amplitude A obey a system of first- order partial differential equations. When the coupling parameter lambda is negative in sign, the system is hyperbolic, which implies that any inhomogeneities in k and A propagate with certain (amplitude-dependent) velocities. These velocities, which are the nonlinear generalization of the group velocity in the Whitham sense, are calculated.
Item Type: | Article |
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Source: | Copyright of this article belongs to Institute of Physics. |
ID Code: | 84969 |
Deposited On: | 28 Feb 2012 12:04 |
Last Modified: | 28 Feb 2012 12:04 |
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