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Kesuke Kobayashi - Kyoto University

Non-equilibrium Noise in Mesoscopic Systems

Since 1980s mesoscopic conductors have been serving as an ideal stage to investigate the scattering problem, as the quantum transport through a single site can be probed in the electric measurement precisely. These days mesoscopic transport is invoking renewed interest from another point of view. As the electron transport can be viewed as the electron exchange process between the reservoirs via the conductor, it serves as a well-defined test stage for nonequilibrium quantum statistical physics.


In this talk, I will discuss and the experimental test of the "Fluctuation Theorem" in the Aharonov-Bohm ring [1]. I will also discuss the current fluctuation in a quantum dot in the Kondo regime [2].


[1] S. Nakamura, Y. Yamauchi, M. Hashisaka, K. Chida, K. Kobayashi, T. Ono, R. Leturcq, K. Ensslin, K. Saito, Y. Utsumi, and A. C. Gossard, Phys. Rev. Lett. 104, 080602 (2010) ; Phys. Rev. B 83, 155431(2011).


[2] Y. Yamauchi, K. Sekiguchi, K. Chida, T. Arakawa, S. Nakamura, K. Kobayashi, T. Ono, T. Fujii, R. Sakano, Phys. Rev. Lett. 106, 176601 (2011).


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