Noise Correlations in Three-Terminal Diffusive Superconductor-Normal Metal-Superconductor Nanostructures

Abstract

We present measurements of current noise and cross-correlations in three-terminal Superconductor-Normal metal-Superconductor (S-N-S) nanostructures that are potential solid-state entanglers thanks to Andreev reflections at the N-S interfaces. The noise correlation measurements spanned from the regime where electron-electron interactions are relevant to the regime of Incoherent Multiple Andreev Reflection (IMAR). In the latter regime, negative cross-correlations are observed in samples with closely-spaced junctions.

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References in corpus (6)

• Nonlocal entanglement in hybrid superconducting and normal-metal three terminal devices
• Current-current correlations in hybrid superconducting and normal metal multiterminal structures
• Charge imbalance in superconductors in the low-temperature limit
• Direct experimental evidence of free fermion antibunching
• Positive current cross-correlations in a highly transparent normal-superconducting beam splitter due to synchronized Andreev and inverse Andreev reflections
• Divergence at low bias and down-mixing of the current noise in a diffusive superconductor-normal metal-superconductor junction

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