Bidirectional single-electron counting and the fluctuation theorem

Y. Utsumi, D. S. Golubev, M. Marthaler, Keiji Saitou, T. Fujisawa, Gerd Schön

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

We investigate the direction-resolved full counting statistics of single-electron tunneling through a double quantum-dot system and compare with predictions of the fluctuation theorem (FT) for Markovian stochastic processes. Experimental data obtained for GaAs/GaAlAs heterostructures appear to violate the FT. After analyzing various potential sources for the discrepancy we conclude that the nonequilibrium shot noise of the quantum point contact electrometer, which is used to study the transport, induces strong dot-level fluctuations which significantly influence the tunneling statistics. Taking these modifications into account we find consistency with the FT.

Original languageEnglish
Article number125331
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number12
DOIs
Publication statusPublished - 2010 Mar 29
Externally publishedYes

Fingerprint

counting
theorems
Statistics
Electrometers
Shot noise
Electron tunneling
Electrons
Point contacts
Random processes
Semiconductor quantum dots
Heterojunctions
electrons
statistics
electrometers
stochastic processes
shot noise
electron tunneling
quantum dots
predictions
gallium arsenide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Bidirectional single-electron counting and the fluctuation theorem. / Utsumi, Y.; Golubev, D. S.; Marthaler, M.; Saitou, Keiji; Fujisawa, T.; Schön, Gerd.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 12, 125331, 29.03.2010.

Research output: Contribution to journalArticle

Utsumi, Y. ; Golubev, D. S. ; Marthaler, M. ; Saitou, Keiji ; Fujisawa, T. ; Schön, Gerd. / Bidirectional single-electron counting and the fluctuation theorem. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 81, No. 12.
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