Convergence in the ab initio symplectic no-core configuration interaction framework

A major challenge in quantitatively predicting nuclear structure directly from realistic nucleon-nucleon interactions arises due to an explosion in the dimension of the traditional configuration interaction basis as the number of nucleons and included shells increases. Combining symplectic symmetry with the no-core configuration interaction framework provides a means of identifying and restricting the basis to include only the highly excited configurations which dominantly contribute to the nuclear wavefunction, thereby reducing the size of the basis necessary to obtain accurate results. We present a framework for ab initio symplectic no-core configuration interaction (SpNCCI) calculations of the nuclear problem and explore convergence behavior of calculations of p-shell nuclei in this framework.