Topological order in Josephson junction ladders with Mobius boundary conditions

Abstract

We propose a CFT description for a closed one-dimensional fully frustrated ladder of quantum Josephson junctions with Mobius boundary conditions, in particular we show how such a system can develop topological order. Such a property is crucial for its implementation as a "protected" solid state qubit.

14 pages, 3 figures, to appear in JSTAT

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