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Phonon relaxation of subgap levels in superconducting quantum point contacts

  • D. A. Ivanov
  • M. V. Feigel’man
Condensed Matter

Abstract

Superconducting quantum point contacts are known to possess two subgap states per propagating mode. In this note we compute the low-temperature relaxation rate of the upper subgap state into the lower one with the emission of an acoustic phonon. If the reflection at the contact is small, the relaxation time may become much longer than the characteristic lifetime of a bulk quasiparticle.

PACS numbers

74.80.Fp 74.25.Kc 

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Copyright information

© MAIK "Nauka/Interperiodica" 1998

Authors and Affiliations

  • D. A. Ivanov
    • 1
    • 2
  • M. V. Feigel’man
    • 1
  1. 1.L. D. Landau Institute of Theoretical PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.CambridgeUSA

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