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Hanbury Brown Twiss effects in channel mixing normal-superconducting systems

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Published in Physica E: Low-dimensional Systems and Nanostructures. 2003, vol. 18, no. 1-3, p. 60-63
Abstract An investigation of the role of the proximity effect in current cross correlations in multiterminal, channel-mixing, normal-superconducting systems is presented. The proposed experiment is an electrical analog of the optical Hanbury Brown Twiss intensity cross correlation experiment. A chaotic quantum dot is connected via quantum point contacts to two normal and one superconducting reservoir. For dominating coupling of the dot to the superconducting reservoir, a magnetic flux of the order of a flux quantum in the dot suppresses the proximity effect and reverses the sign of the cross correlations, from positive to negative. In the opposite limit, for a dominating coupling to the normal reservoirs, the proximity effect is weak and the cross correlation are positive for a nonideal contact between the dot and the superconducting reservoir. We show that in this limit the correlations can be explained with particle counting arguments.
Keywords Mesoscopic systems and quantum hall effectSuperconductivityCondensed matterCurrent correlationsMesoscopic transportSuperconducting proximity effect
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Note 23rd International Conference on Low Temperature Physics (LT23)
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BUTTIKER, Markus, SAMUELSSON, Martin Peter. Hanbury Brown Twiss effects in channel mixing normal-superconducting systems. In: Physica E: Low-dimensional Systems and Nanostructures, 2003, vol. 18, n° 1-3, p. 60-63. https://archive-ouverte.unige.ch/unige:4245

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Deposited on : 2009-11-30

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