Radiative correction to the helium dimer interaction energy

摘要

The leading-order radiative correction to the helium-helium interaction energy at the equilibrium internuclear distance has been calculated for the first time.The result is -1.27(2) mK.The calculations were performed using a new technique of evaluating expectation values of singular operators in connection with the most accurate wave functions of He_2 available today-the exponentially correlated Gaussian functions.