Boundary Field Theory Approach to the Renormalization of SQUID Devices

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dc.creatorGiuliano, Domenico
dc.creatorSodano, Pasquale
dc.date2006-08-27
dc.date2006-12-14
dc.date.accessioned2026-07-07T10:24:15Z
dc.date.available2026-07-07T10:24:15Z
dc.descriptionWe show that the quantum properties of some Josephson SQUID devices are described by a boundary sine Gordon model. Our approach naturally describes multi-junction SQUID devices and, when applied to a single junction SQUID (the rf-SQUID), it reproduces the known results of Glazman and Hekking. We provide a detailed analysis of the regimes accessible to an rf-SQUID and to a two-Josephson junction SQUID device (the dc-SQUID). We then compute the normal component of the current-response of a SQUID device to an externally applied voltage and show that the equation describing the current-voltage characteristic function reduces to well-known results when the infrared cutoff is suitably chosen. Our approach helps in establishing new and interesting connections between superconducting devices, quantum brownian motion, fermionic quantum wires and, more generally, quantum impurity problems.
dc.description54 pages, 1 figure, 1 section added, new figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0608588
dc.identifierhttp://arxiv.org/abs/cond-mat/0608588
dc.identifierNucl.Phys.B770:332-370,2007
dc.identifierdoi:10.1016/j.nuclphysb.2007.02.015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176119
dc.subjectMesoscale and Nanoscale Physics
dc.subjectHigh Energy Physics - Theory
dc.titleBoundary Field Theory Approach to the Renormalization of SQUID Devices
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