The effect of resonance on particle-hole entanglement in NSN nanowires

The shot noise associated with currents in NSN nanowires contains information about dynamical processes in the nanowire. Shot noise in photon currents is always positive due to photon bunching, and in electron currents it is always negative due to fermion anti-bunching. However, for electron current...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2020-06, Vol.586, p.412114, Article 412114
Main Author: Reichl, L.E.
Format: Article
Language:English
Subjects:
Andreev reflection
Bunching
Cooper pairs
Effects
Electron bunching
Electron-hole entanglement
Electrons
Entanglement
Fermions
Holes (electron deficiencies)
Nanowires
Noise
Photons
Resonance scattering
Scattering resonances in an NSN junction
Shot noise
Shot noise in superconducting nano wires
Signal to noise ratio
Superconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The shot noise associated with currents in NSN nanowires contains information about dynamical processes in the nanowire. Shot noise in photon currents is always positive due to photon bunching, and in electron currents it is always negative due to fermion anti-bunching. However, for electron currents that pass through a superconductor, the shot noise can become positive, indicating a bunching effect due to electron-hole entanglement induced by Cooper pairs in the superconductor. We compute the current and shot noise in an NSN nanowire with a long superconducting segment, and show that scattering resonances occur in the wire that can diminish Andreev reflection and entanglement of particle-hole pairs in the wire. The effects of resonance can also be seen in the behavior of the shot noise. •The shot noise associated with currents in NSN nanowires contains information about dynamical processes in the nanowire.•Shot noise in photon currents is positive (photon bunching), in electron currents it is negative (fermion anti-bunching).•Electron currents in superconductors can become positive due electron-hole bunching (entanglement) induced by Cooper pairs.•In NSN nanowires, scattering resonances can diminish Andreev reflection and particle-hole entanglement in the wire.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2020.412114