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Observation of transition from escape dynamics to underdamped phase diffusion in a Josephson junction

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arxiv cond-mat/0501383 v1 pith:63H6BOJ2 submitted 2005-01-17 cond-mat.mes-hall cond-mat.supr-con

J.M.Kivioja , T.E. Nieminen , J. Claudon , O. Buisson , F.W.J. Hekking , J.P.Pekola This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.supr-con
keywords josephsonunderdampedbehaviourcrossoverdiffusiondynamicsphasetransition
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We have investigated the dynamics of underdamped Josephson junctions. In addition to the usual crossover between macroscopic quantum tunnelling and thermally activated (TA) behaviour we observe in our samples with relatively small Josephson coupling E_J, for the first time, the transition from TA behaviour to underdamped phase diffusion. Above the crossover temperature the threshold for switching into the finite voltage state becomes extremely sharp. We propose a (T,E_J) phase-diagram with various regimes and show that for a proper description of it dissipation and level quantization in a metastable well are crucial.

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  1. Joint Communication and Indoor Positioning Based on Visible Light in the Presence of Dimming

    eess.SP 2025-08 conditional novelty 6.0 of 10

    One kinetic equation for the charge distribution in a small Josephson junction describes both dual (quantum) and classical Shapiro steps, with the regime crossover set by a single relaxation time.

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