In the fall of 1926 he went to the University of Zurich to study and work with Erwin Schrödinger, who had early in the year published his papers on his wave mechanics formulation of quantum mechanics. In early spring of 1927, Dennison went back to Copenhagen, and in late spring he went to the University of Cambridge to work with Ralph Fowler for six weeks – there at the time were Ernest Rutherford, Nevill Francis Mott, Pyotr Kapitsa, Patrick Blackett, and John Cockcroft.
In the fall of 1926, he went to the University of Zurich to study under Erwin Schrödinger, who had published his wave mechanics theory for quantum mechanics in early 1927. In spring 1927, Dennison returned to Copenhagen, and then spent six weeks at Cambridge University, where notable physicists like Ernest Rutherford, Nevill Francis Mott, Pyotr Kapitsa, Patrick Blackett, and John Cockcroft were present.