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Journal Articles Physical Review Letters Year : 2010

Nonequilibrium fluctuation relations in a quantum coherent conductor

S. Nakamura
Y. Yamauchi
  • Function : Author
M. Hashisaka
  • Function : Author
K. Chida
  • Function : Author
K. Kobayashi
  • Function : Author
T. Ono
  • Function : Author
R. Leturcq
  • Function : Author
K. Ensslin
  • Function : Author
K. Saito
  • Function : Author
Y. Utsumi
  • Function : Author
A.C. Gossard
  • Function : Author


We experimentally demonstrate the validity of non-equilibrium fluctuation relations by using a quantum coherent conductor. In equilibrium the fluctuation-dissipation relation leads to the correlation between current and current noise at the conductor, namely, Johnson-Nyquist relation. When the conductor is voltage-biased so that the non-linear regime is entered, the fluctuation theorem has predicted similar non-equilibrium fluctuation relations, which hold true even when the Onsager-Casmir relations are broken in magnetic fields. Our experiments qualitatively validate the predictions as the first evidence of this theorem in the non-equilibrium quantum regime
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Dates and versions

hal-00549432 , version 1 (15-07-2022)



S. Nakamura, Y. Yamauchi, M. Hashisaka, K. Chida, K. Kobayashi, et al.. Nonequilibrium fluctuation relations in a quantum coherent conductor. Physical Review Letters, 2010, 104 (8), pp.080602. ⟨10.1103/PhysRevLett.104.080602⟩. ⟨hal-00549432⟩
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