Thermal and quantum decay of supercurrent in highly transparent weak links

Artem V. Galaktionov, Dmitry S. Golubev, Andrei D. Zaikin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We analyze a trade-off between thermal activation (TA) and quantum tunneling in the problem of supercurrent decay in superconducting junctions with highly transparent barriers. In such systems – unlike in conventional tunnel junctions – the supercurrent decay is essentially influenced by low energy Andreev levels forming an intrinsic quantum dissipative environment for the Josephson particle. We evaluate the temperature dependent supercurrent decay rate Γ(T) and elucidate a variety of different regimes for such a decay. We demonstrate that no classical-to-quantum crossover exists in the limit of fully transparent barriers, in which case quantum tunneling always prevails over TA.

Original languageEnglish
Pages (from-to)2001-2012
Number of pages12
JournalEUROPEAN PHYSICAL JOURNAL: SPECIAL TOPICS
Volume227
Issue number15-16
DOIs
Publication statusPublished - 1 Mar 2019
MoE publication typeA1 Journal article-refereed

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