Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-06
Eur.Phys.J. B49 (2006) 83-91
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 2 figure, Latex, revised version
Scientific paper
10.1140/epjb/e2006-00028-x
We show how the recently proposed effective theory for a Quantum Hall system at "paired states" filling v=1 (Mod. Phys. Lett. A 15 (2000) 1679; Nucl. Phys. B641 (2002) 547), the twisted model (TM), well adapts to describe the phenomenology of Josephson Junction ladders (JJL) in the presence of defects. In particular it is shown how naturally the phenomenon of flux fractionalization takes place in such a description and its relation with the discrete symmetries present in the TM. Furthermore we focus on closed geometries, which enable us to analyze the topological properties of the ground state of the system in relation to the presence of half flux quanta.
Cristofano Gerardo
Marotta Vincenzo
Naddeo Adele
Niccoli Giuliano
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