The general expression with the physical significance and positive-definite condition of the eigenvalues of 4 × 4 Hermitian and trace-one matrix are obtain
Using the renormalization group method, the critical behavior of Gaussian model is studied in external magnetic fields on X fractal lattices embedded in two-dim
We investigate the spin correlations in top quark pair production near the threshold at the e+ e- linear collider. Comparing with the results above the threshol
A functional integral approach (FIA) is introduced to calculate the transition temperature of a uniform imperfect Bose gas. With this approach we find that the