Quantum Tera-Hertz electrodynamics in Layered Superconductors

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In close analogy to quantum electrodynamics, we derive a quantum field theory of Josephson plasma waves (JPWs) in layered superconductors (LSCs), which describes two types of interacting JPW bosonic quanta: one massive and the other almost-massless. We also calculate the amplitude of their decay and scattering. We propose a mechanism of enhancement of macroscopic quantum tunneling (MQT) in stacks of intrinsic Josephson-junctions (SIJJs). Due to the long-range interactions between many junctions in the LSCs, the calculated MQT escape rate $Γ$ has a very nonlinear dependence on the number of junctions in the stack. This allows to quantitatively describe striking recent experiments in Bi2212 stacks.
4 pages, 2 figures

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Superconductivity, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/113452

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0607479
 http://arxiv.org/abs/cond-mat/0607479

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arXiv