A new vector theory which conces the necessary and sufficient conditions of the self-trapping of a linearly polarized light beam in Kerr media is presented afte
The Yang-Lee zeros of an antiferromagnetic Heisenberg ladder model are determined. It is found that if J4≤0 Yang-Lee zeros are located on the unit circle and o
The dynamic nature of phase synchronization between chaotic outputs and injected periodic signals is investigated.We find that the collapse of stroboscopic sect
We present an analytical model of a neutral hydrogen disc in a spiral galaxy. The gas disc of the spiral galaxy isassumed to have an exponential surface density