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

Bhaskar Kaviraj (1) , Olivier Coupiac (1) , Hervé Courtois (2) , François Lefloch (1)

1 LaTEQS - Laboratoire de Transport Electronique Quantique et Supraconductivité
2 NEEL - QuNES - Nano-Electronique Quantique et Spectroscopie

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.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Bhaskar Kaviraj, Olivier Coupiac, Hervé Courtois, François Lefloch. Noise Correlations in Three-Terminal Diffusive Superconductor-Normal Metal-Superconductor Nanostructures. Physical Review Letters, 2011, 107, pp.077005. ⟨10.1103/PhysRevLett.107.077005⟩. ⟨hal-00615461⟩