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Achieving the threshold regime with an overscreened Josephson junction.

作者信息

Sukhorukov Eugene V, Jordan Andrew N

机构信息

Départment de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.

出版信息

Phys Rev Lett. 2009 Feb 27;102(8):086806. doi: 10.1103/PhysRevLett.102.086806. Epub 2009 Feb 26.

DOI:10.1103/PhysRevLett.102.086806
PMID:19257771
Abstract

We demonstrate that by utilizing an overscreened Josephson junction as a noise detector it is possible to achieve the threshold regime, whereby the tails of the fluctuating current distribution are measured. This situation is realized by placing the Josephson junction and mesoscopic conductor in an external circuit with very low impedance. In the underdamped limit, overscreening the junction inhibits the energy diffusion in the junction, effectively creating a tunable activation barrier to the dissipative state. As a result, the activation rate is qualitatively different from the Arrhenius form.

摘要

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