Energy and particle number fluctuations in superconducting heterostructures

Ville J. Kauppila, Matti A. Laakso, Tero T. Heikkila

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    We consider fluctuations of the energy on a mesoscopic island coupled to two leads. We use the Keldysh effective action formalism to derive the Langevin equation for the energy of the island in a very general setting and show how the Langevin equation for the case of uncorrelated tunneling events is derived from a more general one. As an application of the theory, we consider a superconducting island coupled to two normal metal leads and calculate the statistics of the temperature (in the quasiequilibrium case) and the number of quasiparticle excitations on the island.

    Original languageEnglish
    Title of host publication2013 22nd International Conference on Noise and Fluctuations, ICNF 2013
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference on Noise and Fluctuations - Montpellier, France
    Duration: 24 Jun 201328 Jun 2013
    Conference number: 22

    Conference

    ConferenceInternational Conference on Noise and Fluctuations
    Abbreviated titleICNF
    CountryFrance
    CityMontpellier
    Period24/06/201328/06/2013

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