Download BCS: 50 years by Leon N. Cooper PDF

By Leon N. Cooper

The BCS thought of superconductivity constructed in 1957 via Bardeen, Cooper and Schrieffer has been remarkably profitable in explaining the homes of superconductors. moreover, ideas from BCS were included into diversified fields of physics, from nuclear physics and dense quark topic to the present commonplace version. functional purposes contain SQUIDs, magnetic resonance imaging, superconducting electronics and the transmission of electrical energy. This precious publication is a compilation of either a old account and a dialogue of the present nation of idea and scan. With contributions from many widespread scientists, it goals to introduce scholars and researchers to the origins, the impression and the present country of the BCS concept.

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You know, we really worked as a team, and I can’t imagine of any more cooperative feeling . . So the next morning we went and chatted with Bardeen and very quickly, as I recall, he looked at it and he said he thought that there was something really there. It was so fantastically exciting that we sort of worked 18 hours a day, because there was just so much to do . . So we were working on two levels. One was saying, “Isn’t it fantastic? ” But on the other level we were having mechanical difficulties of doing all the calculations and working and checking, etc.

And I asked him what he thought about it, should I try this? ” and I told him. ” The program really had been worked out in John’s mind, I don’t know, ten years before or what have you . . He had this thing so nailed down on every corner: he understood the experiments, he understood the general requirements of the theory. 5in J. R. Schrieffer Fig. 1. Robert Schrieffer. mind. And then there was this stumbling block, and that was, you know, how to write down the wave function. Q: Now, Just Where Were You Located at the University?

We wrote down the Hamiltonian and looked at it and couldn’t make any progress on it. We didn’t know how to approach it — various ideas about variational methods, we thought — tried all sorts of approximate schemes . . It was very exciting, but it was very frustrating, needless to say. And it wasn’t clear what was going to happen . . We also felt we were really hot. It was sort of this mixed feeling. We were really on the trail, and it was sort of almost a schizophrenia, you know — we’re going to do it, and we’re not.

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