How Josephson discovered his effect

The discovery of what we have ever since called the “Josephson effect” took place while I was visiting Cambridge, England, for a sabbatical year in 196162. R e c e n t l y , w h e n I t r a v e l l e d t o Kyoto to accept the London Prize on Brian Josephson’s behalf, I put together s o m e r e m i n i s c e n c e s o f t h a t period, which may be more interesting than a mere recapitulation of the bare scientific facts. Lest I appear too central to this account, I should make it clear that at least two other people could have told a similar story from their own points of view. They are Brian Pippard, Josephson’s thesis advisor while the work was being done, and David Shoenberg, director at that time of the Mond Laboratory in which Josephson was a research student in experimental physics and where I served as nominal head of the solid-state theory group.