The effect of surface delta-interaction (SDI) in nucleon-pair shell model truncated to an SD-subspace isstudied. The results show that with the single-particle
Using core-scattered closed-orbit theory and region-splitting iterative method, we calculated the scaled recurrence spectra of helium atom in parallel electric
Under no rotating wave approximation and including the effect of dipole-dipole interaction between the atoms,exact squeezing properties for the output opticasl