Affiliation: | [1]Department of Mathematical and Physical Sciences, Shandong Institute of Light Industry, Jinan 250353 [2]Institute of Theoretical Physics, Technical University of Clausthal, Arnold-Sommer Str. 6, 38678 Clausthal-Zellerfeld, Germany [3]Department of Physics, Olabisi Onabanjo University, Ago-Iwoye, Nigeria |