The Nobel Prize in Physics 1989 was divided, one half awarded to Norman F. Ramsey “for the invention of the separated oscillatory fields method and its use in the hydrogen maser and other atomic clocks”, the other half jointly to Hans Georg Dehmelt and Wolfgang Paul “for the development of the ion trap technique.”

Andrea Ghez
The Nobel Prize in Physics 2020 was divided, one half awarded to Roger Penrose “for the discovery that black hole formation is a robust prediction of the general theory of…