ABSTRACT
I first met David Bohm in the early spring of 1976. At the time I had the idea that, given suitable experimental conditions, certain kinds of superconducting circuits should display manifestly quantum mechanical behaviour over macroscopic length scales. I hoped that such circuits would provide a new experimental vehicle for investigating quantum mechanics. David Bohm was, and is, one of the great authorities on the foundations of quantum mechanics so it seemed natural that I should seek his advice. I found him very approachable and he listened with great patience to my attempts to explain my still rather rudimentary physical views of these circuits. His encouragement then was a great morale booster for our group at Sussex. Eventually we were able to justify that encouragement. We now have superconducting circuits roughly a centimetre across which behave as single quantum objects. I would like to think that in due course these circuits will be of use in testing some of David Bohm’s remarkable ideas concerning the nature of quantum mechanics.
