Radiative correction to the helium dimer interaction energy.
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.
Institute of Theoretical Physics, Warsaw University, Poland.
Krzysztof
K
Pachucki
Jacek
J
Komasa