94-208 Sewell, G. L.

Macroscopic Quantum Approach to Superconductive Electrodynamics (31K, TeX) 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.

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