  The high-momentum antisymmetrized molecular dynamics (HMAMD) is a new
promising framework with significant analytical simplicity and efficiency
inherited from its antisymmetrized molecular dynamics in describing the high
momentum correlations in various nuclear states. In the aim of further
improving the numerical efficiency for the description of nucleon-nucleon
correlation, we introduce a new formulation by including a new Gaussian
weighted basis of high momentum pairs in the HMAMD wave function, with which
very rapid convergence is obtained in numerical calculation. It is surprising
that the very high-momentum components in the new HMAMD basis are found to be
almost equivalent to the contact representation of the nucleon-nucleon pairs
with very small nucleon-nucleon distance. The explicit formulation for the
contact term significantly improves the numerical efficiency of the HMAMD
method, which shows the importance of the contact correlation in the
formulation of light nuclei.
