Energy and particle number fluctuations in superconducting heterostructures

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

doi:10.1109/ICNF.2013.6578884

Energy and particle number fluctuations in superconducting heterostructures

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-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 language	English
Title of host publication	2013 22nd International Conference on Noise and Fluctuations, ICNF 2013
DOIs	https://doi.org/10.1109/ICNF.2013.6578884
Publication status	Published - 2013
MoE publication type	A4 Article in a conference publication
Event	International Conference on Noise and Fluctuations - Montpellier, France Duration: 24 Jun 2013 → 28 Jun 2013 Conference number: 22

Conference

Conference	International Conference on Noise and Fluctuations
Abbreviated title	ICNF
Country	France
City	Montpellier
Period	24/06/2013 → 28/06/2013

Access to Document

10.1109/ICNF.2013.6578884

Link to publication in Scopus

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title = "Energy and particle number fluctuations in superconducting heterostructures",

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.",

author = "Kauppila, {Ville J.} and Laakso, {Matti A.} and Heikkila, {Tero T.}",

year = "2013",

doi = "10.1109/ICNF.2013.6578884",

language = "English",

isbn = "9781479906680",

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note = "International Conference on Noise and Fluctuations, ICNF ; Conference date: 24-06-2013 Through 28-06-2013",

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T1 - Energy and particle number fluctuations in superconducting heterostructures

AU - Kauppila, Ville J.

AU - Laakso, Matti A.

AU - Heikkila, Tero T.

N1 - Conference code: 22

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84883734273&partnerID=8YFLogxK

U2 - 10.1109/ICNF.2013.6578884

DO - 10.1109/ICNF.2013.6578884

M3 - Conference contribution

AN - SCOPUS:84883734273

SN - 9781479906680

BT - 2013 22nd International Conference on Noise and Fluctuations, ICNF 2013

T2 - International Conference on Noise and Fluctuations

Y2 - 24 June 2013 through 28 June 2013

ER -