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Hanbury Brown Twiss effects in channel mixing normal-superconducting systems

Published inPhysica. E, Low-dimensional systems and nanostructures, vol. 18, no. 1-3, p. 60-63
Publication date2003
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 effect
  • Superconductivity
  • Condensed matter
  • Current correlations
  • Mesoscopic transport
  • Superconducting proximity effect
Note23rd International Conference on Low Temperature Physics (LT23)
Citation (ISO format)
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. doi: 10.1016/S1386-9477(02)00961-X
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ISSN of the journal1386-9477
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