- 94-208 Sewell, G. L.
- Macroscopic Quantum Approach to Superconductive Electrodynamics
Jun 20, 94
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Abstract. I present a general, quantum statistical
derivation of superconductive electrodynamics from the
assumptions of off-diagonal long range order (ODLRO) and gauge
covariance of the second kind, without reference to the
microscopic mechanism responsible for the ordering. On this
basis, I prove that the macroscopic wave function, specified by
the ODLRO condition, enjoys the London rigidity property [Lo];
and, from this result, I derive the Meissner and Josephson
effects, and the quantisation of trapped magnetic flux. I also
outline a framework for the treatment of the open problem of
the metastability of supercurrents.