Ripplonic Lamb Shift for Electrons on Liquid Helium
Ripplonic Lamb Shift for Electrons on Liquid Helium
We study the shift of the energy levels of electrons on a helium surface due to the coupling to the quantum field of surface vibrations. As in quantum electrodynamics, the coupling is known, and it is known to lead to an ultraviolet divergence of the level shifts. We show that …