Physics – Condensed Matter
Scientific paper
1993-05-21
Physics
Condensed Matter
24 pages, plain TeX, Report # CMT-HU-N01
Scientific paper
Concepts from elementary quantum mechanics can be used to understand vortex line fluctuations in high-temperature superconductors. Flux lines are essentially classical objects, described by a string tension, their mutual repulsion, and interactions with pinning centers. The classical partition function, however, is isomorphic to the imaginary time path integral description of quantum mechanics. This observation is used to determine the thermal renormalization of critical currents, the decoupling field, the flux lattice melting temperature at low and moderate inductions, and to estimate the degree of entanglement in dense flux liquids. The consequences of the ``polymer glass'' freezing scenario, which assumes that the kinetic constraints of entanglement prevent field cooled flux liquids from crystallizing, are reviewed.
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