Long-range interaction between ground and excited state hydrogen atoms
POSTER
Abstract
The asymptotic expansion at large distances is obtained for the interaction between a ground state hydrogen atom and an excited hydrogen atom with principal quantum number $n=2,\ldots, 10$. A degenerate perturbation theory up to the second order is employed to obtain accurate results. The asymptotic representation for several special cases is found in the limit of large quantum number $n$.
*This work is supported by the National Science Foundation and the U.S. Department of Energy