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16 April 2024

» arxiv » 0911.3470

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Non-equilibrium Fluctuation Relations in a Quantum Coherent Conductor
Shuji Nakamura ; Yoshiaki Yamauchi ; Masayuki Hashisaka ; Kensaku Chida ; Kensuke Kobayashi ; Teruo Ono ; Renaud Leturcq ; Klaus Ensslin ; Keiji Saito ; Yasuhiro Utsumi ; Arthur C. Gossard ;
Date:	18 Nov 2009
Abstract:	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-Nyqusit 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.
Source:	arXiv, 0911.3470
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