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Asymmetric current fluctuations and Andreev states probed with a Josephson junction

Q. Le Masne 1
1 QUANTRONICS - Quantronics Group
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : This thesis presents two type of experiments using a Josephson junction to probe mesoscopic effects. The first part describes the measurement of the third moment of the shot noise emitted by a tunnel junction, by adding this noise to the bias current of a Josephson junction. The second and third moment of the noise affect the switching out of the supercurrent branch, an effect which is quantitatively understood by recent theories. In the second part, we discuss the possibility to probe the present description of the mesoscopic Josephson effect, in particular the two Andreev states carrying the supercurrent. Using a setup able to measure the current-phase relation of a superconducting atomic contact with a Josephson junction, we describe preliminary experiments towards the spectroscopy of the Andreev states.
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Contributor : Hugues Pothier <>
Submitted on : Monday, May 10, 2010 - 3:33:09 PM
Last modification on : Wednesday, December 9, 2020 - 3:13:56 PM
Long-term archiving on: : Thursday, September 16, 2010 - 1:29:47 PM


  • HAL Id : tel-00482483, version 1


Q. Le Masne. Asymmetric current fluctuations and Andreev states probed with a Josephson junction. Condensed Matter [cond-mat]. Université Pierre et Marie Curie - Paris VI, 2010. English. ⟨tel-00482483⟩



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