1. Department of Physics, Government Degree College, Tangmarg, Kashmir, 193402 India
2. School of Physics, Damghan University, P. O. Box 3671641167, Damghan, Iran
3. Inter University Center for Astronomy and Astrophysics, Pune, India
4. Canadian Quantum Research Center 204-3002 32, Ave Vernon, BC V1T 2L7 Canada
5. Departamento de Física, Universidad Nacional de La Plata, 1900 La Plata-Argentina
6. Departamento de Matemática, Universidad Nacional de La Plata, 1900 La Plata-Argentina
7. Consejo Nacional de Investigaciones Científicas y Tecnológicas (IFLP-CCT-CONICET)-C. C. 727, 1900 La Plata-Argentina