Thermal and quantum decay of supercurrent in highly transparent weak links

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • RAS - P.N. Lebedev Physics Institute
  • Karlsruhe Institute of Technology
  • National Research University Higher School of Economics

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut2001-2012
Sivumäärä12
JulkaisuEUROPEAN PHYSICAL JOURNAL: SPECIAL TOPICS
Vuosikerta227
Numero15-16
TilaJulkaistu - 1 maaliskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 32624441