Voltage-Current curves for small Josephson junction arrays

Details Voltage-Current curves for small Josephson junction arrays Voltage-Current curves for small Josephson junction arrays

2007-04-06

arxiv.org/abs/0704.0900v1

Physics

Condensed Matter

Superconductivity

12 pages, 4 figures

Scientific paper

10.1103/PhysRevB.76.214507

We compute the current voltage characteristic of a chain of identical Josephson circuits characterized by a large ratio of Josephson to charging energy that are envisioned as the implementation of topologically protected qubits. We show that in the limit of small coupling to the environment it exhibits a non-monotonous behavior with a maximum voltage followed by a parametrically large region where $V\propto 1/I$. We argue that its experimental measurement provides a direct probe of the amplitude of the quantum transitions in constituting Josephson circuits and thus allows their full characterization.

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