V C Kuriakose
Articles written in Pramana – Journal of Physics
Volume 11 Issue 1 July 1978 pp 17-26
Two dimensional sine-Gordon (SG) field theory on a lattice is studied using the single-site basis variational method of Drell and others. The nature of the phase transition associated with the spontaneous symmetry breakdown in a SG field system is clarified to be of second order. A generalisation is offered for a SG-type field theory in two dimensions with a potential of the from [cos
Volume 33 Issue 2 August 1989 pp 271-276 Particle Physics
The Gaussian effective potential of the sine-Gordon model is calculated in 1+1 and 2+1 dimensions. Issues like renormalization, vacuum energy and stability of the vacuum are discussed in detail.
Volume 39 Issue 5 November 1992 pp 521-528 Research Articles
The first order perturbative correction to the energy levels of a boson realization of a
Volume 42 Issue 4 April 1994 pp 299-309
A detailed physical characterisation of the coherent states and squeezed states of a real
Volume 46 Issue 4 April 1996 pp 305-314 Research Articles
A nonlinear quintic Schrödinger equation (NLQSE) is developed and studied in detail. It is found that the NLQSE has soliton solutions, the stability of which is analysed using variational method. It is also found that the soliton pulse width in the materials supporting NLQSE is small compared to soliton pulse width of the commonly studied nonlinear cubic Schrödinger equation (NLCSE).
Volume 54 Issue 2 February 2000 pp 275-285 Research Articles
We investigate how dissipation and nonlinearity can affect the electromagnetic wave propagating through a saturated ferromagnet in the presence of an external magnetic field in (2+1) dimensions. The propagation of electromagnetic waves through a ferromagnet under an external magnetic field in the presence of dissipative effect has been studied using reductive perturbation method. It is found that to the lowest order of perturbation the system of equations for the electromagnetic waves in a ferromagnet can be reduced to an integro-differential equation.
Volume 57 Issue 4 October 2001 pp 743-754 Research Articles
We obtain conditions for the occurrence of polarization modulational instability in the anomalous and normal dispersion regimes for the coupled nonlinear Schrödinger equation modelling fourth order dispersion effects when the linearly polarized pump is oriented at arbitrary angles with respect to the slow and fast axes of the birefringent fiber.
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