Abstract:Abstract We have seen in the previous chapters that the concept of the macroscopic wave functionΨ(r), is central to understanding atomic Bose–Einstein condensates (BEC), superfluid He, and even superc...Abstract We have seen in the previous chapters that the concept of the macroscopic wave functionΨ(r), is central to understanding atomic Bose–Einstein condensates (BEC), superfluid He, and even superconductivity within the Ginzburg–Landau (GL) theory. But the connection between these ideas is not at all clear, since the atom condensates and He are bosonic systems, while super-conductivity is associated with the conduction electrons in metals which are fermions. The physical meaning of the GL order parameter was not explained until after 1957 when Bardeen Cooper and Schrieffer (BCS) published the first truly microscopic theory of superconductivity. Soon afterward the connection was finally established by Gor’ kov. He was able to show that, at least in the range of temperatures near Tc, the GL theory can indeed be derived from the BCS theory. Furthermore this provides a physical interpretation of the nature of the order parameter. Essentially it is describing a macroscopic wave function, or condensate, of Cooper pairs.Read More
Publication Year: 2004
Publication Date: 2004-03-25
Language: en
Type: book-chapter
Indexed In: ['crossref']
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